Data Files
03/13/2025
Z4 Info File

A downloadable ZIP file containing information related to the Z4 Info File

Data Files
03/13/2025
Early Warning System (EWS002C0.ZIP)

This file is the EWS production file and is updated weekly. This file contains the Early Warning System data file for the CASS™ and MASS™ certification process.

 

Contact Lists
03/12/2025
Business Acceptance Solutions & Major Mailer Support Directory

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

 

Tech Guides
03/11/2025
AI Demo for Informed Delivery Promotion
Announcements
03/11/2025
INFORMATIONAL: Commercial System Releases - March 16, 2025
Announcements
03/11/2025
Post Office/ZIP Code Entries for Postal Bulletin 3/20/2025

This spreadsheet provides details on the Post Office/ZIP Code entry changes for Postal Bulletin issue 3/20/2025.

Announcements
03/11/2025
PROCESSING AND DELIVERY: Normal Operations Have Resumed in Washington and Kentucky
Announcements
03/11/2025
INFORMATIONAL: Manual Address Correction Notices Update
Announcements
03/10/2025
DELIVERY: Southern Area - TX 1 District - Melissa Post Office - Resumed Operations
Contact Lists
03/10/2025
Mailers Technical Advisory Committee (MTAC) Membership Roster and Vacancies - March