Proposition 39

Prohibits Citizens from Voting Unless They Present Government-Issued Identification

Prohibits Citizens From Voting Unless They Present Government-Issued Identification. Initiative Constitutional Amendment. Prohibits voting by mail unless voter designates a government-issued identification number for their voter registration. Invalidates mail ballots if envelope does not include last four digits of a government-issued identification number matching the number designated in the voter's registration (e.g., if voter designates Social Security number for registration, but provides driver's license number on envelope, their ballot would not count). Prohibits voting in person without presenting government-issued identification. Requires elections officials to annually report percentage of each county's voters whose citizenship status they have verified. Summary of the Legislative Analyst's estimate of net state and local government fiscal impact: state and local government costs of between tens of millions of dollars and low hundreds of millions of dollars each year to implement new voting requirements. Costs depend on future decisions by the Legislature, state departments, local governments, and voters.

initiative_constitutional_amendment 2026-11-03 CA

Summary

Proposition 39 is an initiative constitutional amendment placed on the ballot by petition signatures. It would add a new Section 3.1 to Article II of the California Constitution. Under the measure, the Secretary of State and county elections officials would have to keep accurate voter registration lists, use best efforts to verify citizenship attestations using government data, and report each year what percentage of each county's registered voters have had their citizenship verified.

Every time a voter casts a ballot, the voter would have to provide identifying information: in person, by presenting government-issued identification, and by mail, by writing the last four digits of a unique identifying number from government-issued identification on the ballot envelope.

The number written on the envelope would have to match the identification the voter designated for their voter registration, and that designation would appear in the registration record and on the mail ballot envelope sent to the voter. Elections officials could count a regular or provisional ballot only after verifying the voter's identity and that the person cast only one ballot.

On request, the state would have to provide a voter identification card at no charge. The measure says it is self-executing and also directs the Legislature to promptly pass laws to implement it, to provide for voting by military and overseas voters consistent with federal law, and to ensure state and local officials comply.

During every odd-numbered year the California State Auditor would audit the state's and each county's compliance and report findings and recommendations to the public. The Legislative Analyst estimates the measure would increase state and local government costs by tens of millions of dollars to low hundreds of millions of dollars each year, less than one-quarter of 1 percent of the state's total General Fund budget, and says there could also be some savings because fewer people would be registered to vote.^S1^S2^S3^S7^S13

What a yes or no vote means

Yes means

A yes vote means voters would be required to present additional identifying information to elections officials each time they vote.^S2^S3^S6

No means

A no vote means a voter's identity would continue to be established with the voter's signature, and the new identification and citizenship-verification requirements in the measure would not take effect.^S2^S3^S6^S13

How it works

What kind of measure this is: Proposition 39 is a citizen-initiated constitutional amendment submitted to the voters under Section 8 of Article II of the California Constitution. It adds a section to the California Constitution, so the text of proposed laws is printed in italic type in the voter guide to show that the language is new. The Secretary of State's compiled contribution totals page describes it as Establishes Additional Voter Identification and Citizenship Verification Requirements, Initiative Constitutional Amendment, while the voter guide and the Legislative Analyst use the title Prohibits Citizens From Voting Unless They Present Government-Issued Identification.^S1^S7^S8
Path to the ballot: the Institute of Governmental Studies reports that Proposition 39 began as a citizen-initiated constitutional amendment filed with the California Attorney General's office on July 16, 2025, that it received a revised ballot title and was approved for signature gathering on September 19, 2025, and that proponents needed 874,641 valid signatures to qualify it. The campaign submitted nearly 1.37 million signatures on March 2, 2026, and the initiative qualified for the November 2026 ballot as Proposition 39 on April 24, 2026. CalMatters reports that Assemblymember Carl DeMaio, a Republican from San Diego, created the group Reform California and is spearheading the initiative, and that his group funded the ballot operation that collected more than a million signatures to qualify the measure after similar proposals failed in the Democratic-controlled Legislature.^S11^S13
Litigation over the ballot title: the Institute of Governmental Studies reports that on July 27, 2026 Californians for Voter ID filed a lawsuit against the Secretary of State challenging the new ballot title for Proposition 39, which was drafted by Attorney General Rob Bonta. The plaintiffs argued that the new title, which says the measure prohibits citizens from voting unless they present government-issued identification, was false and misleading because it did not include the original title's reference to additional voter identification and citizenship verification requirements. The Attorney General's Office maintained that the revised language more accurately describes the measure's provisions. On August 6, 2026, Sacramento County Superior Court found for the state and ruled that the ballot title is sufficient, so the measure remained on the ballot unchanged.^S13
Where the law goes: the measure adds Section 3.1 to Article II of the California Constitution. Section 3.1(a) gives the Secretary of State and county elections officials the duty to maintain accurate voter registration lists, to use best efforts to verify citizenship attestations using government data, and to annually report what percentage of each county's voter rolls have been citizenship-verified. Section 3.1(b) sets the identification requirements. Section 3.1(c) makes the section self-executing and adds implementation, judicial review and audit provisions. Section 3 of the measure is a severability clause stating that if any portion, section, subdivision, paragraph, clause, sentence, phrase, word or application of the act is held invalid, the remaining portions are to be given effect.^S7
Identification when voting in person: each time a voter casts a ballot in person in any election in the state, the voter would have to present government-issued identification. The measure defines government-issued identification as documentation that allows conclusive verification of the voter's identity. The Legislative Analyst states that elections officials would be required to verify voters' identities before counting their ballots.^S2^S3^S7
Identification when voting by mail: a voter casting a ballot by mail would have to provide the last four digits of a unique identifying number from government-issued identification that matches the one designated by the voter for their voter registration. The type of identification each voter designates must be indicated in their voter registration record, noted on the mail ballot envelope provided to them, and available to them on request by phone or electronically. Elections officials would verify that the identification numbers provided on the ballot envelope match the voter's registration information. The official title and summary states that a mail ballot is invalidated if the envelope does not include the last four digits of a government-issued identification number matching the number designated in the voter's registration, and gives as an example a voter who designates a Social Security number for registration but provides a driver's license number on the envelope, in which case their ballot would not count.^S1^S2^S3^S6^S7
Counting the ballot and the free voter identification card: election officials could count a regular or provisional ballot only after verifying the identity of the person voting under the measure's requirements and verifying that the person cast only one ballot in the election. On request by an eligible voter, the state would have to provide, at no charge, a voter identification card for use in casting a ballot, and the Legislative Analyst states that the card could be used as the government-issued identification that verifies a voter's identity when voting. The Legislative Analyst notes that the exact cost would depend on decisions about the design and requirements of the voter identification card and the number of cards requested.^S2^S3^S7
Implementation, military and overseas voters, judicial review and audits: the section is self-executing, and the Legislature is directed to promptly enact laws to implement it, to provide for voting by military and overseas voters consistent with federal law, and to ensure that all state and local officials comply with and support compliance with the section. Citizens may seek judicial review and remedy of the state's or any county's compliance. During every odd-numbered year, the California State Auditor would audit the state's and each county's compliance with the section and report its findings and recommendations for improving the integrity of elections to the public. The Legislative Analyst describes the same duties: the State Auditor would report in every odd-numbered year on how well the state and each county comply with the measure and would make recommendations for improvement.^S2^S3^S7
What the Legislature would still have to decide: the Legislative Analyst states that Proposition 39 requires the Legislature to pass additional laws to implement the measure and that the Legislature would need to clarify several details that are not defined in the proposition, such as which forms of identification could be used and what steps would be considered best efforts to verify the citizenship status of registered voters. The Institute of Governmental Studies makes the same point, noting that the Legislature would have to pass additional laws before the measure could be fully implemented.^S2^S3^S13
How California identifies voters today, as background: the Legislative Analyst states that a voter's identity is established through the registration process by using a driver's license number, a state identification number, or the last four digits of a Social Security number, and that voters who do not provide this identifying information through registration may be asked to present identification the first time they vote. Voters who vote in person typically identify themselves by signing a list of registered voters before voting, and voters who vote by mail identify themselves by signing the envelope of their ballot. Elections officials verify signatures for mail ballots before counting them and generally do not verify signatures from in-person voters before counting the ballots. All registered voters in California receive a vote by mail ballot, and in the November 2024 Presidential Election about 16 million people voted, about 13 million by mail and about 3 million in person. CalMatters reports that nearly 90 percent of Californians now vote by mail, according to the Secretary of State's office.^S2^S3^S11
What the measure does not change: LAist reports that when someone registers to vote in California they do not have to provide proof of citizenship, that they check a box on the registration form attesting to being a U.S. citizen and California resident, and that lying on that form is a crime punishable by fines and jail time. LAist reports that Proposition 39 would not change that process, and that what it would do is require election officials to make best efforts to verify the citizenship of people on voter registration rolls by cross-referencing their information against government data. CalMatters reports that California voters currently need a driver's license and Social Security number to register to vote but not when they cast their ballots.^S11^S14
Which documents count: LAist reports that the initiative would shrink the long list of documents the state currently accepts as proof of identity and residency for voting purposes, so that if Proposition 39 passes only government-issued identifications such as a driver's license, passport or state identification card would be accepted, and that the measure would require California to offer free state identification cards to eligible voters who lack another type of government-issued identification.^S14

Fiscal impact

The Legislative Analyst's summary of the estimate of net state and local government fiscal impact is state and local government costs of between tens of millions of dollars and low hundreds of millions of dollars each year to implement new voting requirements, with costs depending on future decisions by the Legislature, state departments, local governments and voters.

The analysis states that Proposition 39 would increase state and local government costs each year by tens of millions of dollars to low hundreds of millions of dollars, that these costs represent less than one-quarter of 1 percent (0.25 percent) of the state's total General Fund budget, and that the exact cost would depend on future choices made by the Legislature, state departments, local governments and voters.

As an example of what could move the number, the analysis points to decisions around the design and requirements of the voter identification card and the number of cards requested. The analysis also states that there could be some amount of savings, that these savings would be due to fewer people registered to vote, for example because of the removal of ineligible voters or of eligible voters lacking government-issued identification, and that the savings likely would not exceed the costs of the measure.

The Institute of Governmental Studies summarizes the same estimate: costs in the tens of millions to the low hundreds of millions of dollars annually, less than one-quarter of 1 percent of the state's total General Fund budget, with major costs influenced by decisions about the new voter identification card, administrative requirements and the number of voters requesting cards, and possible savings as ineligible voters or eligible voters lacking the required identification stop voting. LAist reports the same range, from tens of millions to several hundred million dollars.^S1^S2^S3^S4^S6^S13^S14

Who benefits and who pays

Who benefits

Voters who need an identification document and request the state card: the text requires the state to provide a voter identification card at no charge to an eligible voter who requests one, and the Legislative Analyst states the card could be used as the government-issued identification that verifies a voter's identity when voting. The free card is the mechanism the measure uses to address voters who do not already hold a government-issued identification.^S2^S3^S7
Supporters' claim about who gains: the argument in favor says voter identification is a common-sense reform that increases trust and participation, that the measure keeps mail ballots, extended polling hours and other conveniences in place for voting accessibility, that voters can use a variety of easily obtained government identifications, and that it guarantees every voter a free Voter ID if they want one. Supporters also say voter identification increases participation rather than suppressing it, and that every state with voter ID laws and free identification for eligible voters who cannot afford or access identification has seen an increase in voting. These are the supporters' claims as printed in the voter guide and on the campaign website.^S5^S6^S15
Supporters' claim about mail ballot rejections: the argument in favor says California currently uses a slow process to check signatures on mail ballots that delays election results and puts a vote at risk of not being counted if the signature is flagged as not matching, that many voters say they cannot remember how they signed their name years ago when they first registered, and that in the last election more than 100,000 ballots were rejected due to signature mismatches and more than 200,000 voters endured hassles just to get their vote to count. Supporters present the identification requirement as a way to improve that process. These are the supporters' claims; the measure itself does not remove the signature check on mail ballot envelopes.^S5^S6
Supporters' claim about voter list accuracy and oversight: supporters say the measure holds election officials accountable for keeping California's voter lists accurate and updated, requires officials to check voter rolls to ensure only citizens are registered, and requires an independent audit every two years to give the public confidence in how elections are conducted. The text requires an annual report of the percentage of each county's voter rolls that have been citizenship-verified and requires the State Auditor to audit compliance in every odd-numbered year, which is once every two years.^S5^S6^S7
Organizations and people listed in support: the voter guide summary page lists The Transparency Foundation, the Latino American Political Association, the Howard Jarvis Taxpayers Association and the California Women's Leadership Association as supporters. The argument in favor is signed by Margit Whitlock as Democratic Coalition Chair, Tafa Jefferson as Republican Coalition Chair and Joe Green as Independent Coalition Chair, all of Californians for Voter ID. CalMatters and the Institute of Governmental Studies add the California Republican Party, Reform California and Uline chief executive Richard Uihlein. The campaign website lists Julie Luckey as chairman of Californians for Voter ID, and LAist adds Republican gubernatorial candidate Steve Hilton, U.S. Congressman Ken Calvert, Republican state Senator Tony Strickland and Republican Assemblymember Carl DeMaio.^S4^S5^S10^S11^S13^S14^S15

Who pays

State and local government budgets: the Legislative Analyst estimates Proposition 39 would increase state and local government costs each year by tens of millions of dollars to low hundreds of millions of dollars to implement the new voting requirements, which is less than one-quarter of 1 percent (0.25 percent) of the state's total General Fund budget, with the exact amount depending on future decisions by the Legislature, state departments, local governments and voters. The General Fund is the account the state uses to pay for most public services, including education, health care and prisons. County elections officials administer most elections in California and would carry out the in-person and mail ballot identification checks, the citizenship-verification work and the annual reporting the measure requires.^S2^S3^S6
Voters whose mail ballot envelope does not match their registration: the official title and summary states that mail ballots are invalidated if the envelope does not include the last four digits of a government-issued identification number matching the number designated in the voter's registration, giving the example of a voter who designated a Social Security number but wrote a driver's license number on the envelope, in which case their ballot would not count. This is a stated effect of the measure rather than a projection.^S1^S6
Voters who have to obtain identification, in the opponents' framing: the argument against the measure says free state identifications are not really free because voters still pay for transportation, time off work and costs such as childcare or getting required documents, and that seniors, students, low-income workers, voters of color and people who changed their names at marriage are hit hardest. The opposition campaign adds that a voter who does not take extra steps to tell officials which identification to use for voting may not receive a mail ballot at all, and that a voter whose address is not up to date or whose name is misspelled could have a vote rejected. These are the opponents' claims as printed in the voter guide and on their campaign website. The measure itself requires the state to provide a voter identification card at no charge on request.^S5^S6^S7^S16
Possible savings from fewer registered voters, in the Legislative Analyst's own framing: the analysis states there could be some amount of savings and that these savings would be due to fewer people registered to vote, for example because of the removal of ineligible voters or of eligible voters lacking government-issued identification, and that the savings likely would not exceed the costs of the measure. In other words, part of the fiscal effect the analyst identifies is that some people who are eligible may end up not voting.^S2^S3

Support and opposition

Supporters

Total raised: $15,785,413

As of: October 6, 2026

Organizations

Californians for Voter ID, Yes on 39
The Transparency Foundation
Latino American Political Association
Howard Jarvis Taxpayers Association
California Women's Leadership Association
California Republican Party
Reform California
Julie Luckey, Chairman, Californians for Voter ID
Margit Whitlock, Democratic Coalition Chair, Californians for Voter ID
Tafa Jefferson, Republican Coalition Chair, Californians for Voter ID
Joe Green, Independent Coalition Chair, Californians for Voter ID
Steve Hilton, Republican candidate for Governor
Ken Calvert, U.S. Congressman
Tony Strickland, California State Senator
Carl DeMaio, California State Assemblymember
Richard Uihlein

Top funders

Richard Uihlein $17,000,000 Individual, Wisconsin; contributor to committee 1479607 as reported on the Fair Political Practices Commission top 10 contributors list · Donor amount from the FPPC top contributors list (updated 2026-10-14); the total raised is from the Secretary of State through 2026-10-06, so a donor can exceed it.
Joseph N. Gebbia $8,000,000 Individual, Texas; contributor to committee 1479607 · Donor amount from the FPPC top contributors list (updated 2026-10-14); the total raised is from the Secretary of State through 2026-10-06, so a donor can exceed it.
Reform California with Carl De Maio – Ballot Measure Committee $3,103,480 Committee, California; contributor to committee 1479607, listed with top contributors Kathleen Flynn and Kathryn Starr · Donor amount from the FPPC top contributors list (updated 2026-10-14); the total raised is from the Secretary of State through 2026-10-06, so a donor can exceed it.
Nicole Shanahan $370,000 Individual, California; contributor to committee 1479607 · Donor amount from the FPPC top contributors list (updated 2026-10-14); the total raised is from the Secretary of State through 2026-10-06, so a donor can exceed it.
Douglas Leone $250,000 Individual, California; contributor to committee 1479607 · Donor amount from the FPPC top contributors list (updated 2026-10-14); the total raised is from the Secretary of State through 2026-10-06, so a donor can exceed it.

Key arguments

Supporters say voter identification is a bipartisan reform: the argument in favor says Democratic, Independent and Republican voters all agree that voter identification is a common-sense reform to increase trust and participation, that almost half the signatures to put the measure on the ballot came from Democratic and Independent voters, and that polls show widespread super-majority support across all political parties. These are the supporters' claims as printed in the voter guide and on the campaign website.^S5^S6^S15
Supporters say the measure keeps voting accessible while adding identification: the argument says Proposition 39 keeps mail ballots, extended polling hours and all other conveniences in place, that voters can use a variety of easily obtained government identifications, and that the measure guarantees every voter a free Voter ID if they want one. Supporters also point out that 36 states request or require voters to show some form of identification at the polls, according to the National Conference of State Legislatures, and say the mandate is no different from needing an identification to fly on a plane or buy alcohol. These are the supporters' claims.^S5^S6^S11
Supporters say voter identification increases participation and trust: the argument says voter identification does not suppress voting and in fact increases voter participation, that every state with voter ID laws and free identification for eligible voters who cannot afford or access identification has seen an increase in voting, and that suppression and lower turnout happen when voters do not have trust and confidence in the integrity of the process. The rebuttal to the argument against adds that states with voter ID laws have not seen decreases in voter participation. These are the supporters' claims and their reasoning.^S5^S6
Supporters say the measure improves election management: the argument says Proposition 39 improves the accuracy of voter lists and requires independent audits to strengthen election management, holds election officials accountable for keeping voter lists accurate and updated, requires officials to check voter rolls to ensure only citizens are registered, and requires an independent audit every two years. The text requires an annual citizenship-verification report and a State Auditor compliance audit in every odd-numbered year.^S5^S6^S7
Supporters describe their coalition as non-partisan and reject the framing that the measure is about national politics: the argument in favor says politicians and partisan organizations who oppose the measure are trying to inject partisanship into the debate and that the measure is a California solution to mistrust in elections, and the rebuttal to the argument against says Proposition 39 is bipartisan and is not about Donald Trump or Gavin Newsom. The campaign website carries the same theme, describing support for voter identification as transcending party lines. These are the supporters' statements.^S5^S6^S15
Money reported on the support side: the Secretary of State's 2026 ballot measure contribution totals page reports one committee formed to support the measure, CALIFORNIANS FOR VOTER ID, YES ON 39, committee ID 1479607, with a total of $15,785,413 in reported contributions through 10/06/2026. The Fair Political Practices Commission's top 10 contributors list for the November 2026 general election reports $29,853,479.50 in top aggregated contributions in support of the measure, which is the sum of the top contributor amounts it lists for that committee: Richard Uihlein $17,000,000, Joseph N. Gebbia $8,000,000, Reform California with Carl De Maio – Ballot Measure Committee $3,103,479.50, Nicole Shanahan $370,000, Douglas Leone $250,000, Stark Industrial LLC $250,000, Cameron Winklevoss $250,000, Tyler Winklevoss $250,000, Word & Brown $230,000 and Aubrey Chernick $150,000. The two figures measure different things: the Secretary of State total is the committee's reported contributions through 10/06/2026, while the Commission figure is the total donated by the top contributors that list identifies. The campaign website lists its top funders as Richard Uihlein, Joseph N. Gebbia and Reform California with Carl DeMaio.^S8^S9^S15

Opponents

Total raised: $29,637,418

As of: October 6, 2026

Organizations

No on Prop 39 – Californians for Voting Rights
ACLU California Action
ACLU of Northern California
ACLU of Southern California
ACLU of San Diego and Imperial Counties
Common Cause
League of Women Voters of California
California Democratic Party
California Donor Table
Asian Law Caucus
California Black Power Network
Courage California
Disability Rights California
Equality California
For the People Action
NextGen Policy
VietRise
VoteRiders
California Nurses Association
California School Employees Association
California Labor Federation
UCLA Voting Rights Project
David Trujillo, Executive Director, ACLU California Action
Darius Kemp, California State Director, Common Cause
Lorrel Plimier, Co-President, League of Women Voters of California
Catherine Kennedy, President, California Nurses Association
Adam Weinberger, President, California School Employees Association
Alex Padilla, U.S. Senator for California
The Sacramento Bee (media endorsement listed by CalMatters with the oppose side)

Top funders

No on 39 – Block Election Rigging sponsored by nurses, teachers, and nonprofit labor and community health clinic organizations $3,519,472 Committee, California; listed as a top contributor to committee 1495206, United Against Prop. 39 – Stop the Rig
California Democratic Party $3,290,970 Political party committee, California; contributor to committee 1493991, listed with top donors Kalshi, Inc. and the committee Election Rigging Response Act, Newsom's Ballot Measure Committee
California Democratic Party $2,250,000 Political party committee, California; contributor to committee 1495206, United Against Prop. 39 – Stop the Rig
California Nurses Association Initiative PAC $2,000,000 Committee, California; contributor to committee 1495206
The Tribal Council of the Federated Indians of Graton Rancheria $2,000,000 Tribal government, California; contributor to committee 1493991. The Fair Political Practices Commission page prints this entry as $2,000,0000; the amount is recorded here as $2,000,000, which is the value implied by its rank in the list

Key arguments

The argument against the measure, signed by David Trujillo of ACLU California Action, Darius Kemp of Common Cause and Lorrel Plimier of the League of Women Voters of California, says the measure adds new hurdles: voters would have to include a personal identification number on their ballot envelope that has to exactly match state records, so one wrong digit could mean a valid ballot is thrown out; a voter who does not take extra steps to tell officials which identification to use might not receive a mail ballot at all; and a voter whose address is not up to date or whose name is misspelled might have a vote rejected. It also says the measure wastes hundreds of millions of dollars, puts voter identity at risk by putting personal details on return envelopes, and pushes out voters because free state identifications still involve costs for transportation, time off work, childcare and required documents, with seniors, students, low-income workers, voters of color and people who changed their names at marriage affected most. These are the opponents' claims.^S5^S6
The rebuttal to the argument in favor, signed by U.S. Senator Alex Padilla, Catherine Kennedy of the California Nurses Association and Adam Weinberger of the California School Employees Association, says California election officials already verify voters and that the measure just adds extra hurdles for citizens, that when Texas tried this it threw out 12 times more mail ballots than California, that the measure creates new threats of identity theft, and that the Legislative Analyst's Office found it could cost hundreds of millions of dollars each year. It also frames the measure as part of a national political effort rather than a California election administration question. These are the opponents' claims.^S5^S6
The opposition campaign's own material repeats the same four arguments: that the measure wastes hundreds of millions of dollars, that it puts voter identity at risk by requiring personal details on return envelopes, that it blocks citizens from voting through a number that has to match state records exactly and through the risk of losing a mail ballot for not designating an identification, and that free state identifications are not free once transportation, time and documents are counted. The campaign describes itself as a coalition of voting rights advocates, community groups, labor and civil rights organizations. These are the opponents' claims.^S16
Nonpartisan summaries of the case against: CalMatters reports that opponents say requiring identification will make it harder for eligible voters who do not have a driver's license or other supporting documents to vote, and that this will disproportionately affect people with disabilities, people who are low-income and people who have recently moved. The Institute of Governmental Studies summarizes the opposition as arguing that the measure imposes unnecessary barriers on eligible voters without addressing a demonstrated problem in California elections, that existing procedures already provide multiple safeguards, that additional identification and citizenship checks could lead to eligible ballots being rejected with disproportionate effects on people with disabilities, that putting partial identification numbers on mail ballot envelopes raises privacy concerns, that implementation would create significant new administrative costs, and that the measure is part of a national push for stricter voting rules. LAist reports that opponents note documented voter fraud is extremely rare, that they say the initiative feeds into false claims of widespread election fraud, that it would unfairly shut out eligible voters who make simple mistakes such as mixing up an identification number on the envelope, and that the federal system for verifying state voters' eligibility is prone to error.^S10^S13^S14
Opponents' context on how voting works now: LAist reports that election officials verify a voter's identity when they register to vote and also verify that the signature on a mail ballot matches the signature in the voter registration file, but that voters do not have to provide identification every time they cast a ballot, which the measure would change. The Institute of Governmental Studies states that the measure would require identification each time a ballot is cast and that the Legislature would have to clarify details the proposition leaves undefined.^S13^S14
The League of Women Voters of California Education Fund frames the question the same way in its ballot measure guide: whether eligible voters should be required to provide government-issued identification to vote either in person or by mail, and whether the state should be required to maintain voter lists and verify the citizenship status of registered voters. It states that people sign a statement that they are citizens and live in California when they register, that they do not have to show a driver's license or birth certificate to register, that they may need to show identification the first time they vote in a federal election if they register by mail or online, and that California verifies voter information and maintains a list of all registered voters. Its summary of the measure is that it would amend the California Constitution to require voters to show government-issued identification to vote in person or to write the last four digits of a government-supplied identification number on the ballot envelope when voting by mail, that voters would be able to get a free state voter identification card if needed, and that the state would have to maintain voter registration data and verify voters' citizenship status.^S12
Money reported on the oppose side: the Secretary of State's 2026 ballot measure contribution totals page reports six committees formed to oppose the measure, with a combined total of $29,637,418 in reported contributions through 10/06/2026. They are NO ON 39 – BLOCK ELECTION RIGGING (committee ID 1493991) with $16,396,114; UNITED AGAINST PROP. 39 – STOP THE RIG (committee ID 1495206) with $7,770,661; NO ON PROP 39 – CALIFORNIANS FOR VOTING RIGHTS (committee ID 1489007) with $4,088,885; COMMUNITIES FOR AN AFFORDABLE CALIFORNIA, YES ON 3, NO ON 39 AND 43 (committee ID 1496598) with $1,090,000; WORKING FAMILIES FOR A BETTER CENTRAL COAST (committee ID 1496613) with $291,759; and NO ON PROP 39 – VOTERIDERS COMMITTEE (committee ID 1484827) with $0. The Fair Political Practices Commission's top 10 contributors list for the November 2026 general election reports $26,885,500.98 in top aggregated contributions in opposition, marked with an asterisk because some contributors gave to committees that simultaneously supported or opposed more than one measure, so the same contribution is listed for each measure and cannot be attributed to this one alone. Beyond the five funders listed above, the Commission's list also records SEIU California State Council for Working People at $1,071,815.41, the California Teachers Association/Issues PAC, Reed Hastings and Dignity CA Service Employees International Union SEIU Local 2015 at $1,000,000 each, the American Federation of State, County, and Municipal Employees, AFL-CIO small contributor committee at $650,000, the Committee to Engage and Empower California Voters and the California Primary Care Association Advocates Issues Committee at $600,000 each, Service Employees International Union Local 1000 Issues PAC at $500,000, Patty Quillin and M. Quinn Delaney at $1,500,000 each, and the California Community Foundation and Wendy Munger at $100,000 each, among others. The opposition campaign website lists its top funders as Patty Quillin, M. Quinn Delaney and Gwendolyn Sontheim.^S8^S9^S16

How it could affect your household

Household type	Effect	Explanation	Confidence
Homeowner	Neutral	The measure creates no new tax, fee or assessment on homeowners and does not change property tax or income tax rules, so it does not change what this household owes. What it does change is how the household votes: each time a homeowner casts a ballot they would have to present government-issued identification in person or write the last four digits of a designated identification number on the mail ballot envelope, and a mail ballot would not count if that number does not match the registration record. A homeowner who already holds a driver's license or state identification card would see a new step rather than a new cost, and the state would have to provide a voter identification card at no charge to an eligible voter who requests one. The cost of running the new requirements falls on state and local government budgets, which the Legislative Analyst puts at tens of millions to low hundreds of millions of dollars a year, less than one-quarter of 1 percent of the state's total General Fund budget.^S1^S2^S3^S7	Medium confidence
Renter	Neutral	The measure does not change rent rules, housing programs, or any tax or fee a renter pays, and it creates no new charge on this household. Its direct effect on a renter is procedural: identification would be required each time a ballot is cast, and a mail ballot would be invalidated if the last four digits on the envelope do not match the number designated in the voter's registration. Renters who move more often than homeowners would have to keep their voter registration and identification information current, and opponents argue that people who recently moved are among those most affected, while the measure itself requires the state to provide a voter identification card at no charge on request. Whether that concern materializes is disputed and not settled by the official analysis, which identifies costs and possible savings from fewer registered voters without breaking them out by housing tenure.^S1^S2^S3^S5^S7	Medium confidence
W-2 earner ($100k to $250k)	Neutral	The measure adds no tax, surcharge or bracket to the personal income tax and creates no new fee, so this household's state tax bill does not change because of it. The new requirement is identification at the point of voting: presenting a government-issued identification in person or writing the last four digits of a designated identification number on the mail ballot envelope. The cost of implementing the requirements is borne by state and local government budgets, which the Legislative Analyst estimates at tens of millions to low hundreds of millions of dollars a year, less than one-quarter of 1 percent of the state's total General Fund budget, so any effect on this household runs through the state budget rather than through a direct charge.^S2^S3^S7	Medium confidence
High earner (over $1M)	Neutral	The measure does not raise the personal income tax, add a bracket, or change the tax treatment of investment or business income, so it does not directly change this taxpayer's state taxes. The direct change is procedural: identification would be required each time a ballot is cast, in person or on the mail ballot envelope. The measure contains no income test, and its costs fall on state and local government budgets rather than on households, so the effect on a household at this income level runs through the state budget and through how they vote.^S2^S3^S7	Medium confidence
Small business owner	Neutral	The measure imposes no tax, fee or reporting requirement on businesses, and it does not change employment, licensing or tax rules, so a small business owner is affected only as a voter. As a voter, the owner would have to present government-issued identification in person or write the last four digits of a designated identification number on the mail ballot envelope, and a mail ballot would not count if the number does not match the registration record. The measure's costs are state and local election administration costs, which the Legislative Analyst estimates at tens of millions to low hundreds of millions of dollars a year and which could compete with other public spending, and the analysis also identifies possible savings from fewer registered voters that it says likely would not exceed the costs.^S1^S2^S3	Medium confidence
Retiree	Mixed	The measure creates no tax on retirement income, Social Security or pensions and does not change Medi-Cal eligibility or Medicare rules, so it takes nothing directly from a retiree. The change is at the ballot: a retiree would have to present government-issued identification to vote in person or write the last four digits of a designated identification number on the mail ballot envelope, and a mail ballot would be invalidated if that number does not match the registration record. A retiree who no longer holds a current driver's license would need the free state voter identification card the measure requires, and the opponents argue that free identifications still involve costs for transportation, time and documents, which they say falls hardest on seniors among others. The text requires the card to be provided at no charge on request, and the Legislative Analyst identifies possible savings from fewer registered voters, including eligible voters who lack government-issued identification, as a fiscal effect of the measure.^S1^S2^S3^S5^S7	Medium confidence
Local government services user	Mixed	County elections officials would carry out the new identification checks, citizenship-verification work and annual reporting, and the Legislative Analyst estimates the measure would increase state and local government costs each year by tens of millions of dollars to low hundreds of millions of dollars, less than one-quarter of 1 percent of the state's total General Fund budget, with the exact amount depending on future decisions by the Legislature, state departments, local governments and voters. Those costs are a claim on the same state and local budgets that fund the services this person relies on, and the analysis notes possible savings from fewer people registered to vote that it says likely would not exceed the costs. In the other direction, the measure adds an annual citizenship-verification report and a State Auditor compliance audit in every odd-numbered year, which are oversight requirements rather than services, and the Legislative Analyst states the measure does not create a new tax to pay for them.^S2^S3^S6^S7	Medium confidence

Tradeoffs

A new check on every ballot against the burden of producing identification: the measure requires identification each time a ballot is cast, with the state providing a free voter identification card on request for eligible voters who need one. Supporters say voters can use a variety of easily obtained government identifications and that the free card removes cost as a barrier. The opponents' argument says the free card is not really free because transportation, time off work, childcare and required documents still cost money, and says seniors, students, low-income workers, voters of color and people who changed their names at marriage are hit hardest. The official analysis does not resolve this; it estimates costs and identifies possible savings from fewer people registered to vote, which it says likely would not exceed the costs.^S2^S3^S5^S6^S7
Confidence in the count against the risk of a valid ballot not counting: supporters say identification strengthens trust and that signature matching on mail ballots is slow, delays results and rejects valid voters, citing more than 100,000 ballots rejected for signature mismatches in the last election. The official title and summary states that a mail ballot is invalidated if the envelope does not include the last four digits of a government-issued identification number matching the number designated in the voter's registration. Opponents say that rule creates a new way for valid ballots to be rejected, that one wrong digit can void a ballot, and that a voter who does not designate an identification may not receive a mail ballot at all. The measure does not remove the signature check that exists today.^S1^S5^S6^S16
Putting partial identification numbers on ballot envelopes against privacy: the measure requires the last four digits of a designated government-issued identification number to appear on the mail ballot envelope, and it requires the type of identification a voter designated to be noted on that envelope and available on request by phone or electronically. Supporters present this as the mechanism that lets officials verify identity before counting. Opponents argue it makes voters who vote by mail easy targets for identity theft and that no citizen should have to choose between privacy and the right to vote. CalMatters reports that nearly 90 percent of Californians now vote by mail, so most voters would be affected by the envelope requirement.^S5^S6^S7^S11^S16
Costs that depend on decisions not yet made: the Legislative Analyst estimates tens of millions to low hundreds of millions of dollars a year in state and local costs, less than one-quarter of 1 percent of the state's total General Fund budget, and states that the exact cost depends on future choices by the Legislature, state departments, local governments and voters, including the design and requirements of the voter identification card and how many cards are requested. The analysis also says the measure requires the Legislature to pass additional laws and to clarify details the proposition does not define, such as which forms of identification count and what counts as best efforts to verify citizenship status. Opponents describe the cost as hundreds of millions of dollars a year that would go to implementing the measure rather than to other uses.^S2^S3^S5^S6^S13
What the vote decides and what it leaves open: the measure fixes the identification requirement at the ballot, the designation requirement in voter registration, the free state voter identification card, the annual citizenship-verification report, the State Auditor compliance audit in every odd-numbered year, and the self-executing status of the new constitutional section. It leaves to the Legislature and to state and county elections officials the implementing statutes, the list of acceptable identifications, the standard for best efforts in citizenship verification, the design of the voter identification card, and the operational details of verifying identity before counting a ballot. The Institute of Governmental Studies notes that the Legislature would have to pass additional laws before the measure could be fully implemented.^S2^S3^S7^S13
Money on both sides, as reported by two official sources that measure different things: the Secretary of State's compiled totals through 10/06/2026 report $15,785,413 in contributions to the one committee formed to support the measure and $29,637,418 to the six committees formed to oppose it. The Fair Political Practices Commission's top 10 contributors list for the November 2026 general election reports $29,853,479.50 in top aggregated contributions in support and $26,885,500.98 in top aggregated contributions in opposition, a figure marked with an asterisk because some contributors gave to committees that also supported or opposed other measures. CalMatters reported on October 7, 2026 that the supporting campaign had raised more than $36 million, which it described as $13 million more than opponents; that is a different measure of campaign money than either official compiled total. The largest single donors reported on each side are Richard Uihlein at $17,000,000 in support and, among opposition committees, the California Democratic Party and the Federated Indians of Graton Rancheria.^S8^S9^S11
A California election administration question against a national political frame: supporters say the measure is a California solution to mistrust in elections and reject the idea that it is about national politics. Opponents frame it as part of a national push for stricter voting rules. CalMatters reports that conservatives view the measure as a test of support for similar measures in battleground states and that Republican proponents want to see how well or poorly voter identification does in a Democratic-heavy state, and it reports polling that shows support falling below half when voters are given details about the measure, with a Public Policy Institute of California poll in September finding support at 43 percent. Those poll findings are reported as polling results, not as predictions of the outcome.^S5^S6^S11

Sources

Proposition 39 Official Title and Summary (Official Voter Information Guide, November 3, 2026) California Secretary of State Accessed 2026-10-17
Proposition 39 Analysis by the Legislative Analyst (Official Voter Information Guide, November 3, 2026) California Secretary of State and Legislative Analyst's Office Accessed 2026-10-17
Proposition 39 [Ballot], Propositions on the November 3, 2026 Ballot Legislative Analyst's Office Accessed 2026-10-17
Proposition 39 summary page (Official Voter Information Guide, November 3, 2026) California Secretary of State Accessed 2026-10-17
Proposition 39 Arguments and Rebuttals (Official Voter Information Guide, November 3, 2026) California Secretary of State Accessed 2026-10-17
Proposition 39 print version, Official Voter Information Guide (title and summary, analysis by the Legislative Analyst, argument in favor, rebuttal, argument against, rebuttal) California Secretary of State Accessed 2026-10-17
Proposition 39 Text of Proposed Laws, Official Voter Information Guide (new Section 3.1 added to Article II of the California Constitution, with findings and purposes and a severability clause) California Secretary of State Accessed 2026-10-17
Proposition 39 – Establishes Additional Voter Identification and Citizenship Verification Requirements. Initiative Constitutional Amendment., 2026 Ballot Measure Contribution Totals California Secretary of State (Cal-Access) Accessed 2026-10-17
Top 10 Contributors List, November 2026 General Election California Fair Political Practices Commission Accessed 2026-10-17
CalMatters California Voter Guide 2026: Proposition 39, Require identification for voting CalMatters Accessed 2026-10-17
Why are out-of-state billionaires funding a California voter ID measure? (Nadia Lathan, October 7, 2026) CalMatters Accessed 2026-10-17
Prop 39 (2026), Prohibits Voting Without ID, CaVotes ballot measure guide League of Women Voters of California Education Fund Accessed 2026-10-17
Proposition 39: Voter Identification, California Ballot Proposition Guides, November 3, 2026 General Election Institute of Governmental Studies, University of California, Berkeley Accessed 2026-10-17
Prop. 39: The Voter ID measure that would dramatically change voting in California (Jill Replogle, published September 30, 2026, updated October 14, 2026), LAist 2026 voter guide LAist (Southern California Public Radio) Accessed 2026-10-17
Californians for Voter ID, Yes on 39, campaign website of the committee supporting the measure Californians for Voter ID, Yes on 39 Accessed 2026-10-17
No on Prop 39 – Californians for Voting Rights, campaign website of the committee opposing the measure No on Prop 39 – Californians for Voting Rights Accessed 2026-10-17