Steps to creating your Intelligent Mail Barcode

The Intelligent Mail® barcode (IMb®) is a 65-bar Postal Service™ barcode used to sort and track letters and flats. It allows mailers to use a single barcode to participate in multiple Postal Service programs simultaneously, expands mailers’ ability to track individual mailpieces, and provides greater mail stream visibility.

image of an intelligent mail barcode


The Intelligent Mail barcode can be applied on Priority Mail® pieces, First-Class Mail® pieces, USPS Marketing Mail® pieces, Nonprofit USPS Marketing Mail pieces, Periodicals, letters and flats, and Bound Printed Matter flats. The IMb can be used for IMb Informed Visibility® Mail Tracking and Reporting (IV®-MTR) service, and it can be used for address correction services: manual address correction notices, Address Change Service (ACS™), OneCode ACS®, and Intelligent Mail Full-Service ACS™. IMb IV-MTR application provides information about when and where the Postal Service sorts a mailpiece on mail-processing equipment. Traditional ACS, OneCode ACS, and Full-Service ACS provide mailers with electronic address-correction information when a mailpiece cannot be delivered as addressed.

Information about OneCode ACS is available in Publication 8b, OneCode ACS Technical Guide. Information on IMb IV-MTR is available in the IMb IV-MTR User Guide. Users should also read Publication for Streamlined Mail Acceptance for Letters and Flats, which provides in-depth information about the Intelligent Mail program. For information about address quality, go to:

Once the encoder and font are installed, verify the print quality by producing samples, as instructed in the encoder package. The Intelligent Mail Barcode Specification USPSB-3200 and The Intelligent Mail Barcode Technical Resource Guide provide extensive technical information about Intelligent Mail barcodes.