The United States Postal Service quietly changed how it applies postmarks, and that operational tweak could ripple straight into your tax bill. By shifting the postmark from the local counter to ...

Add Yahoo as a preferred source to see more of our stories on Google. For decades, the postmark – an official mark that shows where and when mail was accepted by the Postal Service – has been used in ...

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 a deadline. Instead of reflecting the day you hand a letter to the Postal ...

The U.S. Postal Service is making new changes in 2026, including adjustments to the postmark process, which could result in late fees and penalties for anyone mailing time-sensitive documents such as ...