Many users posted the claim along with a screenshot of a BlueSky user who wrote, "USPS quietly changed its postmark rules — ...

Here's what to know about 2026 Postal Service changes in postmark process, postage stamps and USPS shipping rates ...

Mail could take longer — and cost more. The United States Postal Service is changing postmark rules and shipping prices in ...

The United States Postal Service has changed the postmark process going into 2026, which potentially could add late fees and penalties to parcels.

Changes to how the U.S. mail is stamped are quietly rewriting the rules for anyone who relies on a postmark to prove they met ...

Since 1954, anyone sending in their tax forms to the IRS via mail could use the postmark on their envelope as their date of ...

If you’re mailing something with a firm deadline, the U.S. Postal Service has a change you’ll want to know about — and it could mean the difference between ...

The U.S. Postal Service's new postmark process could lead to late fees and penalties when mailing time-sensitive documents.

Changes by the United States Postal Services on how postmarks will be done could cause issues for some people in the coming year.

What is new at the post office in 2026? Here's what to know about Postal Service changes in postmark process, postage stamps ...