The U.S. Postal Service has proposed a rule that would require states to submit voter-roll data and detailed ballot information before mail-in and absentee ballots are processed.

That change that could result in ballots not being delivered if states do not comply, according to a Federal Register notice and reporting by the Washington Examiner and Reuters.

Under the proposal, states would have to provide lists of voters eligible to receive mail ballots, along with identifying information and unique barcodes tied to ballot envelopes, to a new USPS system before ballots are mailed.

The Postal Service said the system would create a "Mail-In and Absentee Participation List," intended to track ballots, verify mailings, and help detect potential irregularities in federal election mail.

The proposal is tied to President Donald Trump's March executive order on election administration, which directed federal agencies to tighten rules around mail voting and expand voter verification requirements.

Under the framework, ballots that are not linked to state-submitted voter lists could be rejected from USPS processing, effectively requiring states to align mail-ballot distribution with federally compiled voter data.

Supporters argue the changes would strengthen election security by creating a clearer audit trail for mail ballots and improving tracking of ballot movement through the postal system.

Critics, including voting rights groups and some state officials, say the proposal could create new barriers to voting and shift USPS into a quasi election administration role.

The NAACP has asked a federal court to block the rule, arguing it violates a prior settlement governing USPS election-mail practices and could disenfranchise voters who rely on mail voting.

The proposal remains in the public comment period before any final rule is adopted.