Data Files
08/25/2025
Move to Competitive Street Addressing (MTC SA) List

This .txt file contains the MTC SA List.

Data Files
08/25/2025
Pending Route Adjustment File

This Excel sheet details route adjustments for August 2025 thru September 2025.

Quick Service Guides
08/25/2025
PostalOne!® Contingency Plan
Release Notes
08/24/2025
August 24 2025 Release Notes
Announcements
08/22/2025
INFORMATIONAL - USPS APIs Redirect from On-Prem to Cloud
Announcements
08/22/2025
INFOMATIONAL - Priority Mail Open and Distribute (PMOD) Service Updated
Announcements
08/22/2025
PROCESSING AND DISTRIBUTION - Postal Service Addressing Service Delays in the Chicago
Announcements
08/22/2025
INFORMATIONAL - Flat Bundle Processing - September 2025 Mail Direction Files
Release Notes
08/22/2025
August 31 2025 Release Notes
Publications
08/22/2025
Publication 401: Guide to the Manifest Mailing System

This publication provides information on the Manifest Mailing System, which automates the documentation of postage and fees for all pieces in a mailing paid via permit imprint indicia.