Contact Lists
06/27/2024
CASS™/MASS™ Certified Products Guide - All Sections Data Files Cycle O - (Expires July 31, 2028)

This document contains the certified vendors list for CASS™ and MASS™ products for Cycle O.

Data Files
06/27/2024
Z4 Info File

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

Data Files
06/27/2024
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.

 

Announcements
06/26/2024
UPDATED - USPS Ship R13.0.0.0 (6.30.2024)
Announcements
06/25/2024
DELIVERY: Central Area: KS-MO District Town & Country PO (63017)
Technical Specifications
06/25/2024
Known Issues List 6-25-2024
Announcements
06/25/2024
Postal Customer Council Marketing Survey
Presentations
06/25/2024
Mail Growth Incentive - Postage Credit Claim Process Slides

Please see slides detailing how to claim Postage Credits for the Mail Growth Incentive.

Presentations
06/25/2024
Mail Growth Incentive - Postage Credit Claim Process Webinar

Please see a webinar recording detailing how to claim Postage Credits for the Mail Growth Incentive.

Announcements
06/25/2024
DELIVERY: Central Area -IA-NE-SD District