Enterprise Payment System Terms and Conditions

This Terms and Conditions of Use Agreement (this "Agreement") is a legal agreement between you ("You" or "Your" or "User" or "Mailer") and the United States Postal Service, an Independent Establishment of the Executive Branch of the United States Federal Government ("USPS" or "Postal Service"). The Agreement sets forth the terms and conditions for Your use of the USPS Enterprise Payment System. User acknowledges and agrees that he, she or the entity User has accepted the Agreement on behalf of is solely responsible for and shall abide by these Terms and Conditions of Use as well as all policies, procedures and regulations of the United States Postal Service.

Informed Delivery Create Campaign Use Case for Mailers

This user guide provides a summary of use cases for Informed Delivery interactive campaigns through the Mail.dat file format via PostalOne!® Electronic Documentation (eDocs).

KIT 600–the 2024 Official Election Mail Program Kit

Provides the tools necessary to use the US Mail as a secure, efficient, and effective way to facilitate the election process.

Computerized Delivery Sequence (CDS) User Guide

This document contains a user guide for CDS.

Online Postage Due Permit Creation

Guide to Move Update

The Move Update standard is a means of reducing the number of mailpieces in a mailing that require forwarding or return by the periodic matching of a mailer’s address records with change-of-address orders received and maintained by the Postal Service. Mailers who claim First-Class Mail presorted or automation prices and USPS Marketing Mail prices must demonstrate that they have updated their mailing list within 95 days before the mailing date.

Address Element Correction (AEC) & AEC II User Guide

A comprehensive user guide to Address Element Correction (AEC) and AEC II^®. Topics addressed: the importance of address accuracy, differences between AEC I and II, ACS vs. AEC, fees and payments, processing, and technical information.

DSF2® Licensee Performance Requirements - CASS Cycle O

To achieve DSF^2® certification, the Licensee must comply with all requirements and specifications contained within the License Agreement, the most current version of this document, and the most current version of the Interface Developers Guide unless explicitly allowed, prohibited, or modified by USPS in writing.

USPS Service Standards Getting Started Guide

The Postal Service has developed Service Standards data files to help customers determine the number of days in transit. This tech sheet will provide step-by-step instructions on how to use these data files allowing you to streamline your operations and improve customer experience.  

How to Submit Mail.XML Files to PostalOne!