Release Notes
03/29/2026
March 29 2026 PostalOne! Release Notes
Release Notes
03/27/2026
PTR2 Release Notes_DD_03_27_26
Release Notes
03/27/2026
PTR2 Release Notes_DD_03_29_26
Data Files
03/27/2026
Labeling List Changes Effective May 1, 2026

Effective May 1, 2026, the Postal Service™ will revise Labeling List(s) L007, L012, L014, L016, L051, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the May 1, 2026, effective date through June 30, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22700.

Announcements
03/26/2026
PCC Voice Challenge #PCCRepost
Announcements
03/26/2026
INFORMATIONAL - FAST Appointment Update (03.29.2026)
Announcements
03/25/2026
DELIVERY - Diplomatic Post Office (DPO) 09892 - Resume Mailing Services
Announcements
03/25/2026
INFORMATIONAL - U.S. Postal Service Announces Transportation-Related, Time-Limited Price Change
Release Notes
03/25/2026
March 25 2026 Release Notes
User Guides
03/24/2026
Tracking Access Control Tech Sheet

Package Tracking allows seamless integration of real-time tracking information into business systems, enabling monitoring of USPS package status from shipment to delivery.  USPS is upgrading tracking data access to enhance security and combat fraud by modernizing and securing customer access.