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.

The president could put forward an executive order to fire the service's board as early as this week in an attempt to transform the 250-year-old agency.

For years, a huge Amazon contract has been one of the few bright spots in the US Postal Service’s finances. But now the USPS plans to offer those last-mile services to additional customers to stem ...