User Guides
Enterprise Post Office Box Online (ePOBOL) User Guide February 2024

The U.S. Postal Service is upgrading its payment architecture for enterprise and business customers. The new Enterprise Payment System (EPS) will replace the current product-centric payment with a centralized account management system enabling customers to pay and manage their services online using a single account. With the current implementation of EPS, business customers will be able to manage their PO Boxes, Caller Services and Reserves online using the new Enterprise PO Boxes Online (ePOBOL) service.

·         Open, close, and pay for PO Boxes, Caller Services, and Reserves online

·         Automatic Renewals

·         Account notifications and alerts

·         View account payments, balances, and transaction history

·         Customized payment reporting and dashboard capabilities

·         To get started, please contact

User Guides
Computerized Delivery Sequence (CDS) User Guide

This document contains a user guide for CDS.

User Guides
User Guides
Parcel Labeling Guide

This document has been developed to make it easier to create and use labels on parcels shipped via the United States Postal Service® (USPS®). While some flexibility exists in design of shipping labels, using these standards will make label certification easier and make processing your parcels more efficient.

User Guides
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, USPS Marketing Mail prices, and Parcel Select Lightweight prices must demonstrate that they have updated their mailing list within 95 days before the mailing date.

User Guides
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.

User Guides
DSF2® Licensee Performance Requirements - CASS Cycle O

To achieve DSF 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.

User Guides
Business Customer Gateway: Overview and Tour

This presentation provides an overview of the Business Customer Gateway and a tour for new users. Information on the new Revoke and Archive feature begins on page 32.

User Guides
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.