Starting now, the date stamped on a letter will reflect when it's first processed by an automatic sorter, not the date you dropped it ... Prior to December 24, if you dropped off a letter with a stamp at the Last week the United States Postal Service quietly and legally clarified what the Instead of showing the day your dropped off your mail, the
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USPS changing postmark process, could affect the way you send important mail
USPS clarifies postmark rules that could impact ballot and tax deadlines
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USPS rolling out postmark changes
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USPS rule change alters postmark timing for mail delivery
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Last Updated: May 21, 2026
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