Announcements
10/10/2025
DELIVERY - Atlantic Area - North Carolina District Stella Post Office (28582) Permanently Closed
Announcements
10/10/2025
INFORMATIONAL - 2026 Mailing Promotions Kickoff Webinar
Presentations
10/10/2025
WestPac AIM - USPS Mail Growth Incentive - September 10, 2025
Presentations
10/10/2025
AIM Meeting WestPac Area - September 10, 2025
Announcements
10/09/2025
INFORMATIONAL - USPS APIs System Maintenance October 12, 2025
Contact Lists
10/09/2025
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
Contact Lists
10/09/2025
RDI™ Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)

This document outlines the CASS/MASS certified vendors list for RDI™ Cycle O.

Contact Lists
10/09/2025
CASS™ Certified Products Guide: M L O C R Mailers/Users Data File Cycle O - (Expires July 31, 2028)
Contact Lists
10/09/2025
CASS™ Certified Products Guide: M L O C R Mailers/Users Cycle O - (Expires July 31, 2028)
Contact Lists
10/09/2025
CASS™ Certified Products Guide: M L O C R Service Bureaus Data File Cycle O - (Expires July 31, 2028)