It might be tougher in my state because we allowed ballots that were received by mail on Election Day, but without a postmark. One of the accusations of voter f

It might be tougher in my state because we allowed ballots that were received by mail on Election Day, but without a postmark. One of the accusations of voter fraud includes backdating the postmarks on some number of ballots so they would be counted. Obviously postmarks weren't created or intended to be cryptographic verification of when something was received anyway.