INFORMATIONAL - Federal Register - Manifest Mailing System Retiring

INFORMATIONAL - NCOA API Launching July 2026

PTR2 Release Notes_DD_02_28_26

Known Issues List 3.2.2026

Informed Visibility Mail Tracking & Reporting Machine Count

List of US Postal Service machines by site, including a description of each machine.

ZIP Codes by Area and District codes

The Excel spreadsheet lists ZIP Codes with the associated Area and District Codes.  

USPS Ship Data Dictionary

Detailed information on the USPS Ship (Formerly Package Platform) data elements available through the Informed Visibility Mail Tracking & Reporting (IV-MTR) application. Please note that items in bold text were updated or added recently.

Automated Zone Indicator (AZI) Table

The AZI table lists each five-digit ZIP Code™ and is an indicator of the type of processing that typically takes place on letter mail destined for each ZIP Code. Each number in the file is a ZIP Code appended with a numeric zone indicator. The five numeric indicators are as follows:

1. Two Pass Zones: Automated two-step sector/segment at mail processing facilities
2. 876 Carrier Route Sort Zones: Automated incoming secondary carrier route sorting at plants
3. Carrier Route Barcode Sorter (CSBCS) Zones: Automated walk sequence sorting on CSBCS machines at delivery units
4. Delivery Barcode Sorter (DBCS) Zones: Automated walk sequence sorting on DBCS machines at plants [i.e., sectional center facilities (SCFs)] or at delivery units
5. Manual/Mechanized Zones: No automated sorting; no tracking code scans should be generated from facilities matched to these ZIP Codes

March 1 2026 Release Notes

INFORMATIONAL - PME Guarantee Suspension and Shipping Delays

INFORMATIONAL: Mail Spoken Here - February Issue

INFORMATIONAL - USPS Addressing API Major Enhancements Coming July 2026

INFORMATIONAL - USPS Ship (Package Platform) - INCIDENT 10424647 USPS Ship January and February Manifest Processing Delay

INFORMATIONAL - USPS APIs System Maintenance March 11, 2026

PCC Insider February 2026 Edition

Undeliverable-as-Addressed (UAA) Mail Roll-Up 1998-2025

Professional Development Series - Poor Communications Can Destroy Your Career with Floyd Creecy

https://usps.zoomgov.com/rec/share/Iy9r8HUNE1RGjLvrgP5ehz2mMhlBGAfMzJtFq-8T3iG91vJhJQ6eepxP2oYqYloV.dtudJneQRochTjt9

Passcode: 3FBJm1!Z

Professional Development Series - Poor Communications can Destroy Your Career with Floyd Creecy

https://usps.zoomgov.com/rec/share/Iy9r8HUNE1RGjLvrgP5ehz2mMhlBGAfMzJtFq-8T3iG91vJhJQ6eepxP2oYqYloV.dtudJneQRochTjt9

Passcode: 3FBJm1!Z

February 26 2026 Release Notes

February 25 2026 Release Notes

Enterprise Payment System Terms and Conditions

This Terms and Conditions of Use Agreement (this "Agreement") is a legal agreement between you ("You" or "Your" or "User" or "Mailer") and the United States Postal Service, an Independent Establishment of the Executive Branch of the United States Federal Government ("USPS" or "Postal Service"). The Agreement sets forth the terms and conditions for Your use of the USPS Enterprise Payment System. User acknowledges and agrees that he, she or the entity User has accepted the Agreement on behalf of is solely responsible for and shall abide by these Terms and Conditions of Use as well as all policies, procedures and regulations of the United States Postal Service.

Provisioning Mail Quality Data with Informed Visibility® Mail Tracking and Reporting

Mail Quality Data (MQD-IV) leverages the Informed Visibility^® Mail Tracking & Reporting (IV^®-MTR) application to enable mailers to receive uncapped Mail Quality Data. Detailed error data from the Mailer Scorecard is available for Full Service, Move Update, eInduction, and Seamless Acceptance.

DELIVERY - WestPac Area - CO-WY District - Mesa Verde National Park Post Office - Resume Operations

Labeling List Changes Effective April 1, 2026

Effective April 1, 2026, the Postal Service™ will revise Labeling List(s) L002, L005, L007, L012, 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 April 1, 2026, effective date through May 31, 2026, expiration date. The changes will be published in the Postal Bulletin, Issue #22698.

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.

Informational - USPS Webinar on AI, Direct Mail and Mailing Promotions

July 2026 Release Overview

Note: For the latest technical specifications, please see the July 2026 Price Change Release Notes as they are published. Mail.dat and Mail.XML updates required for this release. 

Pending Route Adjustment File

This Excel sheet details route adjustments for February 2026 thru April 2026.

INFORMATIONAL: USPS Modernization through Package Equipment Upgrades in February and March 2026

PROCESSING AND DISTRIBUTION: USPS Closures Due to Weather Impacts Across the Northeastern United States

Periodicals Application Process FAQ

Periodicals Application Process FAQ

INFORMATIONAL - Mail Growth Incentive - Upcoming Important Dates

Delivery - Mesa Verde National Park Post Office - Temporary Closed

February 22 2026 Release Notes

DELIVERY - Military Post Offices Temporarily Suspended

PTR2 Release Notes_DD_02_21_26

INFORMATIONAL - FAST Helpdesk Hours Change

INFORMATIONAL - 2026 Southern Area AIM Meeting - Orlando, Florida

INFORMATIONAL - Pub 401 and Manifest Mailing System (MMS) Retirement

PCC National Monthly Touchpoint (February)

INFORMATIONAL: Commercial System Releases - February 22, 2026

INFORMATIONAL: USPS APIs System Maintenance - February 25, 2026

Business Acceptance Solutions & Major Mailer Support Directory

This document provides a contact list for Business Acceptance Solutions (formerly Business Mailer Support) & Major Mailer Support

INFORMATIONAL: Daily USPS API On-Board Webinars

Secure Destruction - A Primer for Mailers

This document provides information on the Secure Destruction, a Primer for Mailers webinar.

Secure Destruction Plant ZIP Look Up Table

This document provides a ZIP Code lookup table for Secure Destruction plants.

PROCESSING AND DISTRIBUTION - Postal Service Updates for March 2026 S&DC Activations

INFORMATIONAL - Commercial System Releases – February 26, 2026

INFORMATIONAL - Commercial System Releases – February 15, 2026