Announcements
08/14/2026
DELIVERY: WestPac Area: CO-WY District - Hasty Post Office (81044) - Temporarily Closed
Announcements
08/14/2026
INFORMATIONAL - Business Customer Gateway Issues
Announcements
08/14/2026
INFORMATIONAL - RESOLVED - USPS Applications - INCIDENT 10942833 Intermittent Unavailability and Errors
Announcements
08/14/2026
INFORMATIONAL - Hawaii - Tropical Storm Lala – Operations Weather Advisory
Announcements
08/14/2026
INFORMATIONAL -UPDATE - PostalOne! Release – August 16, 2026
Contact Lists
08/14/2026
Business Acceptance Solutions & Major Mailer Support Directory

This document provides a contact list for Business Acceptance Solutions (formerly Business Mailer Support) & Major Mailer Support

 

Contact Lists
08/14/2026
MPE (Mail Processing Equipment) Service Provider Licensees

Marketing contact information for certified Mail Processing Equipment (MPE) licensees 

Presentations
08/13/2026
PCCAC Certification Webinar-Beyond the Stamp: Unlocking the Power of Marketing Mail with Zach Bowden

 

 

https://usps.zoomgov.com/rec/share/M8XcQJAuA3G2nw5PNXY5tuOd0a5YLGFV04x5KqF5fEwwQKA-p09zQ6zXnuSha_RM.z-oSaN6SmJXz-dWF

Passcode: z1@T4?Lp

Announcements
08/13/2026
PROCESSING AND DISTRIBUTION - Update - Central Region – Upper Midwest and Ohio Valley- Severe Weather Impacts
Announcements
08/13/2026
INFORMATIONAL - Cancellation of Daily Addressing and NCOA + Webinars
Announcements
08/13/2026
DELIVERY - WestPac Area - Washington District - Mead and Nine Mile Falls Post Offices – Resume Operations
Announcements
08/13/2026
PROCESSING AND DISTRIBUTION - Central Region – Upper Midwest and Ohio Valley- Severe Weather Impacts
Fact Sheets
08/13/2026
Addresses API - Tech Sheet
Error Codes
08/13/2026
Known Issues List 8.6.2026
Contact Lists
08/13/2026
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
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
08/13/2026
CASS™ Certified Products Guide: M L O C R Mailers/Users Data File Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: M L O C R Mailers/Users Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: M L O C R Service Bureaus Data File Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: M L O C R Service Bureaus Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: M L O C R Hardware Manufacturers Data File Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: M L O C R Hardware Manufacturers Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: Z4CHANGE Data File Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: Z4CHANGE Cycle O - (Expires July 31, 2028)
Contact Lists
08/13/2026
CASS™ Certified Products Guide: Vendor/Service Licensees Data File Cycle O - (Expires July 31, 2028)