For decades, a USPS postmark has served as official evidence that mail was sent on time. In elections, many state laws treat ...

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.

If you're mailing any time-sensitive documents, you may want to mail it earlier than usual under the agency's new postmark ...

From tax returns and bill payments to mail-in ballots, understanding the new guidance is important to ensure your mail is ...