Polywrap Manufacturer List

Mail Quality Data through IV®-MTR Data Dictionary

Domestic Merchant Returns API: User Guide

This user guide provides examples of XML transactions to the USPS Merchant Returns web service and guidance for installation.

PostalOne!® Contingency Plan

Publication 401: Guide to the Manifest Mailing System

This publication provides information on the Manifest Mailing System, which automates the documentation of postage and fees for all pieces in a mailing paid via permit imprint indicia.

2026 Add-Ons

2026 First-Class Mail Advertising Promotion

The 2026 First-Class Mail Advertising Guidebook provides you with all the details you need to successfully participate in the promotion. In the Guidebook you will find information on the eligibility of mailpieces, information on the Mailing Promotions Portal, and more. Navigate the document via the buttons on the side to quickly access the information most relevant to you.

2026 Tactile, Sensory & Interactive Promotion

The 2026 Tactile, Sensory & Interactive Guidebook provides you with all the details you need to successfully participate in this promotion. In the Guidebook you will find information on the eligibility of mailpieces, information on the Mailing Promotions Portal, and more. Navigate the document via the buttons on the side to quickly access the information most relevant to you.

2026 Continuous Contact Promotion

The 2026 Continuous Contact Guidebook provides you with all the information you need to successfully participate in this promotion. In the Guidebook you will find information on the eligibility of mailpieces, information on the Mailing Promotions Portal, and more. Navigate the document via the buttons on the side to quickly access the information most relevant to you.

INFORMATIONAL - Southern Area Virtual AIM Meeting Registration is OPEN