Release Notes
10/27/2026
PTR1 Maintenance Notes_DD_10_31_26
Data Files
10/27/2026
Labeling List Changes Effective December 1, 2026

Effective December 1, 2026, the Postal Service™ will revise Labeling List(s) L001, L004, L009, L010, L012, L015, L016, L201, L602, L605, 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 December 1, 2026, effective date through January 31, 2027, expiration date. The changes will be published in the Postal Bulletin, Issue #22715.
 

Announcements
10/26/2026
Delivery - Hughesville Post Office (20637) - Resumes Operations
Announcements
10/26/2026
INFORMATIONAL - Scheduled Maintenance for November 14, 2026 – Possible Disruption with USPS Payments API
Release Notes
10/24/2026
Informed Delivery API Release Notes V1.0.3
Technical Specifications
10/24/2026
Informed Delivery API Technical Specifications V1.0_5.1
Announcements
10/23/2026
INFORMATIONAL - USPS APIs System Release Notification - REVISED
Announcements
10/23/2026
INFORMATIONAL - Oracle PSU Patching - PPI, PASS, MANIF, GEO, and ADP
Announcements
10/23/2026
INFORMATIONAL - Commercial System Releases – October 28, 2026 and November 1, 2026
Announcements
10/23/2026
INFORMATIONAL - PostalOne! Alert – October 25, 2026
Announcements
10/23/2026
INFORMATIONAL - Informed Delivery Mailer Campaign Portal (MCP) Scheduled Outage on October 24
Announcements
10/23/2026
INFORMATIONAL - Postal One System Promotions Not Applied to Postal Wizard Statements
Release Notes
10/23/2026
November 1 2026 Program Registration 31.4.0.0 Pre-Release Notes
Contact Lists
10/23/2026
Mailers Technical Advisory Committee (MTAC) Membership Roster and Vacancies
Data Files
10/23/2026
Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Development Tracker

This document provides a list of active IV-MTR work to be as well as items completed in the current fiscal year.

 

*Please note, Postal Pro is the only source for a current IV-MTR Development log as updates will be made on an ongoing basis.

Program Requirements
10/23/2026
Plus One Product Requirements (Technical) (Updated 10/23/26)

Plus One Updated 10/23/26

Fact Sheets
10/22/2026
Intelligent Mail® for Small Business (IMsb) Fact Sheet

This fact sheet contains an overview of the IMsb Tool, its benefits, and how it works.

Announcements
10/21/2026
DELIVERY - UPDATE - Akron Post Office (35441) Suspended Temporarily
Announcements
10/21/2026
INFORMATIONAL - European Union Requirements for Product Identifiers Effective November 1, 2026
Technical Specifications
10/21/2026
Mail.xml Technical Specifications for FAST 16.0
Technical Specifications
10/21/2026
Mail.xml Technical Specifications for FAST 14.0A
Announcements
10/21/2026
DELIVERY - Suspension of Mail Service to Argentina - Effective October 23, 2026 - November 11, 2026
Release Notes
10/20/2026
PTR2 Release Notes_DD_10_24_26
Presentations
10/20/2026
PCC National Monthly Touchpoint (October)
Announcements
10/19/2026
DELIVERY - Akron Post Office (35441) Permanently Suspended