Postal Service Final Rule on Postmarks and Postal Possession

Postal Service final rule on Postmarks and Postal Possession. The rule adds a new section to the Domestic Mail Manual defining postmarks and describing their usage. The rule is effective 12/24/25. AILA is evaluating the potential impact of this rule. (90 FR 52883, 11/24/25) 

POSTAL SERVICE 

39 CFR Part 111 Postmarks and Postal Possession 

AGENCY: Postal Service. 

ACTION: Final rule.