Announcements
07/18/2025
DELIVERY - WestPac Area – CO-WY District – Niwot Post Office – Resume Operations
Announcements
07/18/2025
DELIVERY: WestPac Area – AZ-NM District – Mimbres & Hanover Post Offices – Resume Operations
Release Notes
07/18/2025
July 27 2025 Release Notes
Announcements
07/18/2025
INFORMATIONAL - PostalOne! System – Postage Statement Discount Reporting Issue for Seamless Mailings
Program Requirements
07/18/2025
2025-2026 Catalog Insights Promotion

The 2025-2026 Catalog Insights Guidebook provides you with all the details you need to successfully participate in this promotion. In the Guidebook you will find information on the eligibility, information on the Mailing Promotions Portal, and more. Navigate the document via the buttons on the side to quickly access the information most relevant to you.

                                                  QUICK LINKS                                                  
Catalog Insights Promotion FAQs
Catalog Insights Promotion Webinar Slides
Catalog Insights Promotion Webinar Recording
Contact Lists
07/17/2025
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
Contact Lists
07/17/2025
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
07/17/2025
CASS™ Certified Products Guide: M L O C R Mailers/Users Data File Cycle O - (Expires July 31, 2028)
Contact Lists
07/17/2025
CASS™ Certified Products Guide: M L O C R Mailers/Users Cycle O - (Expires July 31, 2028)
Contact Lists
07/17/2025
CASS™ Certified Products Guide: M L O C R Service Bureaus Data File Cycle O - (Expires July 31, 2028)