Could Proposition 39 change how your ballot is verified? The proposal calls for ID and four digits

What would Proposition 39 do?

Proposition 39 is a proposed amendment to the California Constitution on the November 3, 2026, ballot. It concerns how a voter’s identity would be verified when voting in person or returning a vote-by-mail ballot.

The California Secretary of State’s summary says in-person voters would have to present government-issued identification. Vote-by-mail voters would have to write the last four digits of a designated government-issued identification number on the envelope. The summary says mail ballots without those digits would be invalid.

This is a proposal, not a current voting rule. Voters still have to decide whether to approve it.

What the official guide says — and leaves out

The official guide estimates that implementing the new requirements could cost tens of millions to the low hundreds of millions of dollars each year. That is a fiscal estimate in the guide, not money already spent.

The guide’s YES/NO explanation says a YES vote would require voters to provide additional identifying information to election officials each time they vote. A NO vote would leave voter identity established by the voter’s signature.

The voter guide summary does not list every type of identification that would qualify. This article does not speculate about whether a driver’s license, passport or another document would meet the proposal’s rules.

What do the two sides argue?

The official guide lists The Transparency Foundation, Latino American Political Association, Howard Jarvis Taxpayers Association and California Women’s Leadership Association among the supporters. Their ballot argument says the identification requirement would increase confidence in elections.

The guide lists ACLU California Action, Common Cause and the League of Women Voters of California among the opponents. Their argument says the new requirements could create barriers, expose personal information and cost public money.

Those are arguments submitted by the named sides, not findings by an auditor or by this newsroom. The guide also includes a fiscal estimate. It does not establish in advance whether the proposal would increase confidence or prevent eligible voters from casting ballots.

Where can voters read the source material?

The state voter guide includes Proposition 39’s summary, its YES/NO explanation, arguments from both sides and the fiscal impact. The measure’s full text is also available online.

Election Day is Tuesday, November 3, 2026. Voters can read the official Proposition 39 summary, the 2026 voter guide in Vietnamese, and the full text of the measure before deciding.

Proposition 39 raises questions about identification, signatures, personal information and the cost of administering elections. Voters make the decision at the ballot box; the official guide records the proposal and the arguments submitted by both sides.

Bolsa Bridge does not endorse candidates or take positions on ballot measures. This article summarizes public records so you can decide for yourself.