04/10/2026
04/10/2026
04/10/2026
04/09/2026
04/09/2026
04/08/2026
04/08/2026
04/08/2026
04/08/2026
04/07/2026
04/07/2026
04/07/2026
04/07/2026
Enterprise Payment System (EPS) Deposit Instructions
These instructions include general technical information and instructions for sending electronic funds into your EPS account. The information here is designed for trust customers (and debit customers who need to initiate a fund transfer to cover a debit return problem).
04/07/2026
Informed Delivery® Post-Campaign (IDPC) Data through IV-MTR® Data Dictionary
This document describes the Informed Delivery Post-Campaign (IDPC) data fields available through the IV-MTR application.
04/06/2026
04/06/2026
04/03/2026
04/03/2026
04/03/2026
04/03/2026
04/03/2026
04/02/2026
04/02/2026
04/02/2026
04/02/2026
Undeliverable-as-Addressed (UAA) Statistics by Mailing Industry Quarterly Report (Q2 FY26)
ACS Nixie stats by industry for FY26 Q2.
04/02/2026
04/01/2026
04/01/2026
04/01/2026
04/01/2026
Informed Visibility Mail Tracking & Reporting Machine Count
List of US Postal Service machines by site, including a description of each machine.
03/31/2026
03/31/2026
03/31/2026
03/31/2026
03/31/2026
03/30/2026
03/30/2026
USPS APIs Terms and Conditions
ACKNOWLEDGEMENT AND ACCEPTANCE. Read this carefully before registering to use the USPS API services. By utilizing the APIs, you hereby ACCEPT ALL of the terms and conditions of this Agreement.
03/29/2026
03/27/2026
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.
03/26/2026
03/26/2026
03/25/2026
03/25/2026
Beyond the Mail
Turn USPS’s unmatched doorstep reach into smarter decisions with Beyond the Mail—powered by USPS Post Office and Collection Box Data, USPS Occupancy Trends, and USPS Population Mobility Trends for sharper planning across real estate, retail, logistics, and more.
03/25/2026
03/25/2026
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.