Data Files
12/08/2025
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Fact Sheets
12/08/2025
Addressing Fact Sheet for First-Class Flats

This document is for mailers who are sending flat-size mail (such as large envelopes) at Automation and Presorted First-Class Mail prices. To use these prices, you must mail at least 500 pieces at a time, prepared and sorted according to Postal Service guidelines.

Contact Lists
12/08/2025
Presort Accuracy, Validation, and Evaluation (PAVE™) Certified Products List

This document provides a listing of all PAVE™ certified products.

Announcements
12/05/2025
INFORMATIONAL - Retirement of Dane A. Coleman, Vice President of Processing Operations
Announcements
12/05/2025
PROCESSING AND DISTRIBUTION: Unload Delays at Kansas City, MO and Louisville, KY Processing Facilities
Technical Specifications
12/05/2025
Mail.dat Technical Specifications R63.0.0.0
Announcements
12/04/2025
INFORMATIONAL - USPS Ship (INCIDENT # 10234251) Data delay
Data Files
12/04/2025
PTR2 Event Scripting Changes (Excel Document)
Contact Lists
12/04/2025
CASS™ Certified Products Guide: Residential Delivery Indicator Cycle O - (Expires July 31, 2028)
Contact Lists
12/04/2025
RDI™ Cycle O: Certified Products Guide (D) - (Expires July 31, 2028)

This document outlines the CASS/MASS certified vendors list for RDI™ Cycle O.