Release Notes
04/14/2025
April 13, 2025 Release Notes
User Guides
04/14/2025
Automated Certificate of Mailing User Guide
Fact Sheets
04/14/2025
Mail Anywhere Fact Sheet

Mailers have the opportunity to use the same permit at any location via the Mail Anywhere program. 

Announcements
04/13/2025
DELIVERY: Central Area – KY-WV District – Glen Rogers Post Office – Temporarily Suspended
Announcements
04/11/2025
Last Day to Register Online for the 2025 National Postal Forum (NPF)
Announcements
04/11/2025
INFORMATIONAL: Last Day to Register Online for the 2025 National Postal Forum (NPF)
Announcements
04/11/2025
INFORMATIONAL: RESCHEDULED - July 2025 Market Dominant Price Change Webinar
Applications/ Forms
04/11/2025
Modifications to Population Mobility Trends License and Supporting Documents
Announcements
04/11/2025
INFORMATIONAL - Updated - Scheduled Commercial Systems Activities - April 13 2025
FAQs
04/11/2025
Intelligent Mail Matrix Barcode (IMmb) FAQ Page

The IMmb is a two-dimensional, GS1 DataMatrix barcode used for routing and tracking of packages within the USPS processing network.  Presently the IMmb is used in combination with the Intelligent Mail Package Barcode (IMpb) to improve processing efficiency.