Intelligent Mail Matrix Barcode (IMmb) Technical Specifications

Shipping labels on irregularly-shaped packages, softpacks, and polybags can easily become distorted or creased during automated parcel processing making reading the traditional, linear IMpb barcode challenging to scan.  USPS has developed the IMmb to help overcome these challenges and improve package visibility.  IMmb barcodes contain the same data as is in the IMpb barcode; however, they use a more robust, space-efficient robust barcode symbology for encodation.  The smaller barcode footprint allows two IMmb barcodes to be added within unused areas of existing standard shipping labels.  The result is redundancy of the barcode data giving sorters two additional chances to read the barcode. 

The US Postal Service® requires  IMmb barcodes on all package shipping labels.

NCOA API Specifications

Informed Delivery API Technical Specifications V1.0_5.0

Mail.dat Technical Specifications R63.0.0.0

Addressing API Specifications

Addressing API - Vendors

Addressing API - End Users - Tech Sheet

National Change of Address - API

Mail.xml Technical Specifications R63.0.0.0

Intelligent Mail Container Barcode Technical Specifications

Technical specifications for printing the USPS Intelligent Mail® Container barcode (IM™ Container barcode). The Intelligent Mail Container barcode is used on mailer-generated pallet labels to uniquely identify pallets and similar containers (i.e. All Purpose Containers, hampers, pallet boxes, etc.) in addition to identifying the mail owner.

Enterprise Payment System IV-MTR Data Elements

Informed Delivery Mail.XML Mailer Guide

This is a guide for submitting campaigns to PostalOne! via Mail.XML electronic documentation (eDoc).

Informed Delivery Mail.dat Mailer Guide

This is a mailer guide for creating campaigns via PostalOne! through Mail.dat eDoc submission.

Mail.xml Technical Specifications R62.0.0.0

Mail.dat Technical Specifications R62.0.0.0

Priority Mail Next Day 5D5D

TED-C Mailpieces & Informed Delivery®

To ensure die-cut visibility for Informed Delivery® recipients, the leftmost edge of the die-cut extension must be in Zone C of the TED-C Letter Template. If the die-cut extension's leftmost edge is not in ZONE C, it may be acceptable to mail, but there may not be any visibility of the die-cut in Informed Delivery® for recipients.

Trailing Edge Die-Cut (TED-C) Process for Eligibility at Automation Letter Prices

This advisory provides the process for getting approval to mail a non-rectangular trail edge die-cut (TED-C) letter-size mailpieces at the applicable automation letter prices. 

Mail.XML Technical Specifications R60.0.0.0 V3

Mail.dat Technical Specifications R60.0.0.0 V3

2024 Informed Delivery Promotion Technical Implementation-v4.3

This document outlines the technical requirements needed to successfully claim the Informed Delivery discount through PostalOne! eDoc.

Mail.XML Technical Specifications R59.0.0.0 V2

Mail.dat Technical Specifications R59.0.0.0 V2

Informed Delivery Promotion - Submission Checklist

If you are having trouble with your Informed Delivery Promotion discount not applying to postage, please utilize this checklist. The checklist can help you identify the why your discount may not be applying.

Retail Distribution Codes (RDC) Data Dictionary

This document contains the file format of the RDC Assignment files and the logic to determine the correct Retail Distribution Code (RDC).