USPS updated its postmark rules. Here's what that means for your mail

Many users posted the claim along with a screenshot of a BlueSky user who wrote, "USPS quietly changed its postmark rules — ...
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How USPS Postmark Change Could Affect Mail Deadlines

The U.S. Postal Service (USPS) implemented new procedures for dating mail on Dec. 24, postmarking letters and packages with ...

Ballots, tax returns and other important mail may not get postmarked the day you turn it in, Postal Service warns

If you rely on postmarks when casting your ballot, filing your taxes or paying bills, a new US Postal Service rule makes it clear that you should plan ahead.