Announcements
04/17/2026
INFORMATIONAL - REMINDER - July 2026 Market Dominant Price Change Filing Webinar - TODAY - Friday, April 17, 2026
Release Notes
04/17/2026
PTR2 Release Notes_DD_04_18_26
Presentations
04/16/2026
PCCAC: News You Need to Know From MTAC- April 2026

 

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Announcements
04/16/2026
DELIVERY -International Service Resumption of Mail Service to Qatar - Effective April 17, 2026
Announcements
04/16/2026
DELIVERY - West Meridian Post Office (39307) - Suspended Temporarily
Error Codes
04/16/2026
Known Issues List 4.14.2026
Release Notes
04/16/2026
USPS APIs Release Notes

For the latest updates, please review the USPS APIs Release Notes.

Contact Lists
04/16/2026
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
Contact Lists
04/16/2026
CASS™ Certified Products Guide: M L O C R Mailers/Users Data File Cycle O - (Expires July 31, 2028)
Contact Lists
04/16/2026
CASS™ Certified Products Guide: M L O C R Mailers/Users Cycle O - (Expires July 31, 2028)