How Mail Ballots Are Counted: Signature Checks, Cure and Deadlines

Updated Nov. 2, 2026, 2:00 p.m. ET. This explainer is based on published guidance from the U.S. Supreme Court, the U.S. Election Assistance Commission, NCSL, CEIR and state and county election offices. No results from the Nov. 3 general election have been released.

This guide explains how mail ballots are counted in the 2026 midterm elections, from the moment an envelope reaches an election office to the day results are certified. Rules are set state by state, so the same ballot can be handled on very different timelines depending on where the voter lives.

Knowing how mail ballots are counted helps explain why some states report most votes on election night while others keep adding ballots for days. For the state-by-state results schedule, see our guide on when 2026 midterm results will be known.

What happened

Millions of voters have already returned mail ballots or voted early, as tracked in our report on the record early vote in the 2026 midterms. Each returned mail ballot now moves through the same basic steps, on different timelines.

Step 1: Receipt and logging

When a mail ballot arrives by mail, drop box or hand delivery, the election office records it as received and links it to the voter’s registration record. California, for example, offers a statewide “Where’s My Ballot?” tracking tool, according to the California Secretary of State.

Step 2: Signature and ID checks

Before any ballot is opened, officials check the outer envelope. CEIR describes this first phase, which it calls envelope processing, as including “eligibility and identity verification (signatures, ID numbers, etc.), cure for deficiencies in eligibility and identity information, and envelope sorting.” In California, the signature on the return envelope is compared with the signature or signatures in the voter’s registration record, and the ballot is then separated from the envelope “to preserve the secrecy of your ballot,” the California Secretary of State says.

Step 3: Fixing a problem, known as curing

If an envelope is missing a signature or the signature does not appear to match, many states give the voter a chance to fix it. NCSL reports that 35 states and Washington, D.C., have statewide cure processes that require officials to notify voters of a missing signature or a signature discrepancy and give them an opportunity to correct it. “In states that do not have such a process, ballots with missing or mismatched signatures on the envelope are not counted,” NCSL says.

Cure deadlines vary widely. In Florida, a voter must return a “Vote-by-Mail Ballot Cure” affidavit with a copy of identification no later than 5 p.m. local time on the second day after the election, according to the Florida Department of State. In California, a signature verification statement for the Nov. 3 election must reach the county elections office no later than 5 p.m. on Nov. 25, 2026, according to the California Secretary of State.

Latest development

The Supreme Court’s ruling on late-arriving ballots

In Watson v. Republican National Committee, argued March 23 and decided June 29, 2026, the U.S. Supreme Court held that the federal election-day statutes “do not prevent Mississippi from counting absentee ballots postmarked by election day but received up to five days thereafter.” Mississippi law counts absentee ballots postmarked on or before Election Day and received no more than five business days later.

The vote was 5-4, according to SCOTUSblog. Justice Amy Coney Barrett wrote for the majority, and Justice Samuel Alito wrote a dissent. The opinion describes Mississippi as “one of roughly 30 States that count at least some absentee ballots mailed by election day but received afterward.” NCSL says that after the ruling, existing state receipt deadlines remain in place.

States set their own deadlines

The ruling did not require any state to accept late-arriving ballots; it left the choice to state law. NCSL counts 35 states that require mail ballots to be received by Election Day and 15 states, plus Washington, D.C., Guam, Puerto Rico and the U.S. Virgin Islands, that count ballots postmarked by Election Day and received later. The court’s figure of roughly 30 states is larger because it includes states that accept only some late ballots, such as those from military and overseas voters.

Ohio is one state that moved the other way. Under Senate Bill 293, mail ballots in Ohio must be received by the county board of elections by the close of polls at 7:30 p.m. on Election Day, starting with the May 5, 2026, primary, the Cuyahoga County Board of Elections says. “Postmarks no longer matter,” the board says. Ballots from military and overseas voters can still be received up to four days after Election Day. Under the previous law, mailed ballots could arrive up to four days after the election if properly postmarked, according to Ohio’s Legislative Service Commission and NCSL.

Florida also requires arrival by Election Day. A returned ballot “must be received, regardless of postmark,” by the county Supervisor of Elections no later than 7 p.m. local time on Election Day, according to the Florida Department of State.

California takes a different approach. Mailed ballots must be postmarked on or before Election Day and received no later than seven days after Election Day, according to the California Secretary of State. The office advises mailing at least five days before Election Day.

Why it matters

Processing, scanning and counting are different steps

Processing means checking and preparing envelopes. Scanning means feeding ballots into tabulators. Releasing totals is a separate step that no state allows before polls close.

NCSL reports that 44 states, Washington, D.C., Puerto Rico and the U.S. Virgin Islands allow processing to begin before Election Day, and six states allow it only on Election Day before polls close. NCSL also reports that 33 states, D.C. and Puerto Rico allow ballots to be scanned before Election Day, while 17 states and the Virgin Islands do not allow scanning until Election Day.

CEIR, using its own definitions, reaches similar but not identical numbers in its fall 2026 pre-processing report, current as of Aug. 24, 2026. It finds that 45 states and D.C. allow or require envelope processing before Election Day, that 27 states begin it when a ballot is received and that at least 33 states allow scanning before Election Day. Only three states, Alaska, Alabama and Mississippi, do not permit scanning until after polls close, CEIR says. NCSL lists seven states in that group, reflecting different definitions.

Both groups agree on the main point: “No matter when ballot scanning begins, no state allows results to be released until after polls close on Election Day,” CEIR says. In California, counties may begin opening and processing vote-by-mail envelopes up to 29 days before Election Day, but those results “cannot be accessed or shared with the public until all polls close,” according to the California Secretary of State.

Why totals keep changing after election night

States that process early can usually report a large share of their mail ballots soon after polls close. In California, the first results posted are typically ballots received before Election Day, including mail ballots and ballots cast at early voting locations, the Secretary of State says.

Ballots that arrive late in the process take longer. California notes that “many more vote-by-mail ballots are dropped off at polling locations, drop box locations, or arrive at county elections offices on Election Day,” and that eligible ballots arriving up to seven days later must also be processed. Each still needs a signature check, and some will go through cure.

That is why totals often move for days: ballots are added as they clear each step. Results reported on election night are unofficial, even when they say “100% Precincts Reporting,” according to the U.S. Election Assistance Commission. Our explainer on projected vs. certified election results covers what happens after a race is called.

What happens next

Military and overseas ballots

Ballots from military and overseas voters often follow their own deadlines. NCSL reports that 30 states and D.C. accept at least some of these ballots after Election Day. Ohio allows them to arrive up to four days after Election Day, and Florida provides a 10-day extension for overseas voters in general elections if the ballot is postmarked or dated by Election Day, according to those states’ election offices.

The canvass and certification

After election night, counties keep counting eligible ballots and then certify their results. In California, counties count provisional ballots, conditional ballots from same-day registrants and late-arriving mail ballots during a 30-day canvass, and the Secretary of State certifies statewide results 38 days after the election, according to the Secretary of State. Other states differ; see our guide to voting on Nov. 3.

What voters still holding a ballot can do

Voters who still have a mail ballot should check their own state’s rule, because a ballot mailed on Election Day may arrive too late to count in states that require receipt by the close of polls. Florida, for example, lists secure drop boxes at county Supervisor of Elections offices until 7 p.m. on Election Day. The California Secretary of State lists a missing signature and a signature that does not compare as common envelope problems, so voters should sign and seal the envelope as instructed.

Related live coverage

Follow results as they are reported on our 2026 midterm election live results page. Find every guide in the US Midterm Elections 2026 hub, and follow Washington news on US Politics Live.

Sources

• U.S. Supreme Court: Watson v. Republican National Committee, No. 24-1260 (decided June 29, 2026); SCOTUSblog: Justices uphold state law allowing for late-arriving mail-in ballots (June 29, 2026)
• National Conference of State Legislatures: Tables 11, 15 and 16 on receipt and postmark deadlines, cure processes and processing start dates (updated September and October 2026); Center for Election Innovation & Research: Pre-Processing Timelines, Update Fall 2026
• U.S. Election Assistance Commission: Election Results, Canvass, and Certification
• California Secretary of State: Vote by Mail; Verify My Signature; Official Canvass, Vote Counting Process
• Florida Department of State: Vote-by-Mail; Cuyahoga County Board of Elections: Recent Election Law Updates (SB 293); Ohio Legislative Service Commission: S.B. 293 bill analysis. Sources last updated 2:00 p.m. ET Monday, Nov. 2, 2026.