Usps Changes Postmark System Delaying Stamp Cancellation Until Processing Information Center
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Prior to December 24, if you dropped off a letter with a Brian Marks, associate professor in the Dept. of Economics and Business Analytics at the Univ. of New Haven, talks about This change will effect all mail that needs deadline validation upon mailing. Don't wait Incredibly proud moment! My wife, Dr. Cambria J. Nwosu, was cited by The Wall Street Journal for her viral breakdown of the ...
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USPS changes postmark system, delaying stamp cancellation until processing
U.S. Postal Service Announces Changes to Postmark Process
USPS changes could delay postmarks
USPS clarifies postmark rules that could affect mail deadlines
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Last Updated: May 21, 2026
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