Publications
01/25/2015
Intelligent Mail® Package Barcode (IMpb) Options for Federal Agencies

As of January 25, 2015, the Intelligent Mail® Package Barcode (IMpb) is required for Certified Mail®, Registered Mail®, Priority Mail® and all packages.

Publications
07/28/2013
Appendix B: ACS™ Frequently Asked Questions

This document provides frequently asked questions (FAQs) and answers about the Intelligent Mail® Barcode, Traditional ACS™, OneCode ACS™, Full Service ACS™, Single Source ACS™, and the Intelligent Mail® Package Barcode (IMpb).