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!

How to Submit Mail.dat Files to PostalOne!

Parcel Data Exchange (PDX) API Customer Guide

This document provides a customer reference guide for Parcel Data Exchange (PDX) Web Application API.

Parcel Data Exchange (PDX) Web Application User Guide

The Parcel Data Exchange (PDX) is accessed via the web and Application Programming Interface (API) to allow customers to send manifest files and receive outbound files from the United States Postal Service® (USPS®). This document provides the information necessary to begin using the web-based portion of the PDX application using a web browser.