01/29/2026
01/29/2026
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.
01/21/2026
Publication 205 eVS Electronic Verification System Pre-certified
Software certified for mailers to use eVS for parcel shipping:
*Precertified for file format.
*Precertified for labels.
01/16/2026
Presort Accuracy, Validation, and Evaluation (PAVE™) Certified Products List
This document provides a listing of all PAVE™ certified products.
01/05/2026
12/19/2025
Mail Tracking Vendor List
This document provides contact information for a number of third-party service providers who offer mail owner and mail service provider solutions.
10/09/2025
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
10/03/2025
Secure Destruction Plant ZIP Look Up Table
This document provides a ZIP Code lookup table for Secure Destruction plants.
10/02/2025
08/27/2025
USPS® Approved Manufacturers of Mailing Containers for Adult Birds
A list of contact information for adult bird container manufacturers that have been certified by USPS.