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

That postmark on a letter or package sent through the U.S. Postal Service (USPS) no longer means what it used to.As of Dec.

The recent updates to the USPS postmark regulations include changes in the timing and visibility of postmarks on letters and packages. Key changes include: Postmark Timing: The USPS will now postmark ...