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08/29/2024
DSF2® Licensees Cycle O: Certified Products Guide - (Expires July 31, 2028)
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08/29/2024
DPV® Licensees Data File Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)
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08/29/2024
DPV® Licensees Cycle O: Certified Products Guide - (Expires July 31, 2028)
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08/29/2024
CASS™ Software Manufacturers Data File Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)
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08/29/2024
CASS™ Software Manufacturers Cycle O - (Expires July 31, 2028)
Contact Lists
08/29/2024
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.

Contact Lists
08/29/2024
Mail Service Provider (MSP) - Full-Service Certified Mailers

A Mail Service Provider (MSP) offers a variety of solutions to prepare and present Full-Service presort mailings. For more information regarding Certified MSPs, please follow this link: https://postalpro.usps.com/full-service-cert/fact-sheet

 

Data Files
08/29/2024
Z4 Info File

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

Data Files
08/29/2024
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
08/28/2024
INFORMATIONAL: Postal One! R60.0.3.1 - Scheduled Commercial System Release - August 29, 2024