The pipeline, in one paragraphA mail ballot has to survive six separate checkpoints that an in-person ballot never faces: it has to be requested (or automatically sent), it has to reach the right address, the voter has to assemble a nested set of envelopes correctly, sign the outer one in a way that matches a signature on file, get it back before a deadline, and — if any of that fails — respond to a notice in time to fix it. In 2024, states transmitted 66,867,671 mail ballots. 47,957,093 came back — a 72% return rate. 47,629,437 were counted and 584,463 were rejected. The 18.9 million that were never returned at all are the largest number on this page and the one nobody argues about.
The 2024 funnel · EAVSTransmitted to voters
66,867,671
Returned by voters
47,957,093
Transmitted volume fell 26.3% from the 90,687,978 mail ballots transmitted in 2020. Bars are scaled to ballots transmitted; the rejected bar is drawn at a visible minimum because 584,463 is 0.9% of 66.9 million. Excludes military and overseas (UOCAVA) ballots, which EAVS counts separately.
01
You get a ballot — by request, or automatically
In 2024, 68% of states did not require a reason to request a mail ballot; about one-third still did. Nine jurisdictions send a ballot to every active registered voter without any request (all-mail elections), and three more do so in certain counties. Roughly 45% of states let a voter join a permanent list and receive a ballot for every future election — though most of those restrict the list to voters with a disability, an illness, or an age qualification.
EAC 2024 Policy Survey (Q24, Q25, Q26)
02
The ballot arrives in an envelope system, not loose
A mail ballot packet is a nested set of documents: the ballot itself, in some states an inner secrecy envelope, and an outer return envelope carrying an affidavit or declaration the voter signs. Each layer is a place a ballot can fail. Missing secrecy envelopes alone accounted for 3.7% of all 2024 rejections; in Pennsylvania in 2022 they accounted for nearly 35% of that state’s rejections.
EAVS 2024 Table 1; Science Advances, "Measuring lost votes by mail"
03
You mark it at home and sign the envelope
The signature on the outer envelope is the identity check that replaces the poll worker. It is also the single largest cause of failure: 40.7% of rejected 2024 mail ballots were rejected for a non-matching or incomplete signature, and another 10% had no signature at all. Five states additionally require a witness signature — 5.6% of rejections.
EAVS 2024 Table 1
04
You return it: mail, drop box, or in person
Drop boxes have quietly become the dominant return channel where they exist. Among the 21 states able to report the data in 2024, 14.9 million ballots — 44.6% of all returned mail ballots — came back through a drop box rather than the mail, up an average 9.2 points from 2022. Thirty-six states used drop boxes; 32 could count them, reporting 14,958 in total.
EAVS 2024, items C3a–C6a
05
Signature verification, then notice-and-cure
Election staff compare the envelope signature against the one on file. If it fails, 43 states allow the voter to cure the defect. In 2024, 585,457 ballots entered curing; 317,191 were saved and 270,753 were not — a 54.3% national success rate, ranging from 94.8% in Maryland to 21.4% in D.C. Curing is the difference between a flagged ballot and a lost vote, and it is entirely a function of state law.
EAVS 2024, items C7a–C7c
06
The deadline: received-by vs postmarked-by
Thirty-six states require the ballot to be in the election office’s hands by Election Day. Fourteen states plus D.C., Guam, Puerto Rico and the U.S. Virgin Islands count ballots postmarked by Election Day and received during a grace period — one day in Texas, seven in California, fourteen in Illinois, twenty-one in Washington. Military and overseas deadlines are more generous almost everywhere.
NCSL Table 11 (updated 2026-06-29)
07
Chain of custody, then the count
Accepted envelopes are separated from ballots before tabulation, which is what makes a mail ballot secret and also what makes it impossible to un-count one later. At least 47 states plus D.C. now let voters track their own ballot online through systems like BallotTrax, Ballot Scout and BallotTrace — the closest thing mail voting has to a receipt.
Movement Advancement Project; state election offices
Receipt deadlines · the split that Watson preserved36
states require receipt BY Election Day
14 + DC
count ballots POSTMARKED by Election Day
Washington21 days (14 for primaries)
Illinois14 days
Alaska10 days
District of Columbia10 days
Maryland10 days (by 10 a.m.)
California7 days
New York7 days
Oregon7 days
New Jersey6 days (144 hours)
Mississippi5 business days
Nevada4 days
Massachusetts3 days (by 5 p.m.)
Texas1 day (by 5 p.m.)
Puerto Ricothrough the general canvass
Source: NCSL Table 11, updated June 29, 2026 — the same day the Supreme Court decided Watson. Guam, Puerto Rico and the U.S. Virgin Islands also allow post-Election Day receipt. Military and overseas deadlines are more generous in most states and are tabulated separately, which is why other counts of “grace-period states” run as high as 30.
Drop boxes · the channel that replaced the mailbox44.6%
of returned mail ballots
36 states used drop boxes in 2024; 32 could count them. Among the 21 states that could report ballot volumes, 14,933,114 ballots came back through a box rather than the mail — 20.8% of every ballot cast in those states. Utah's drop-box share rose 23.4 points in a single cycle.
The practical consequence: in much of the country “mail voting” now describes where you fill the ballot out, not how it travels. A drop-box return has no postmark and therefore no postmark risk.
Curing · 2024States allowing curing43 of 56 reporting
Ballots set aside585,457
Successfully cured317,191 (54.3%)
Not cured — rejected270,753
Best / worst stateMaryland 94.8% · District of Columbia 21.4%
ScopeThis Dot is about the mail/absentee method — its history, its mechanics, its rejection data and the current legal fight. The state-by-state rules landscape — registration, voter ID, early voting, turnout, the whole ballot-access picture — lives next door in How America Votes. We link it rather than duplicate it.