Announcements
02/20/2018
Mailing Standards for Lithium Batteries
Tech Guides
02/16/2018
CASS™ Technical Guide for Cycle N

This document provides a technical guide for the CASS™ product. The CASS™ certification process is designed in cooperation with the mailing industry to improve the accuracy of addresses for mail qualifying for postal discounts.

Release Notes
02/15/2018
Program Registration R19.1.0.0 Release Notes Change 1.0
Release Notes
02/15/2018
PostalOne! R47.0.2.0 Pre-Release Notes Change 2.0
Technical Specifications
02/15/2018
Mail.dat Technical Specifications R47.1.0.0 (Version 2)

Version 2 of the comprehensive technical guide that outlines steps for exchanging electronic data with the PostalOne! System.

Technical Specifications
02/15/2018
Mail.XML Technical Specifications R47.1.0.0 (Version 2)

Version 2 of the comprehensive technical guide that outlines steps for exchanging electronic data with the PostalOne! System.

FAQs
02/13/2018
eVS Automated Refund Request for Unused Labels Frequently Asked Questions (FAQ)
Fact Sheets
02/13/2018
eVS Automated Refund Request for Unused Label Fact Sheet
Release Notes
02/09/2018
PostalOne! R47.0.2.0 Pre-Release Notes Change 1.0
Program Requirements
02/08/2018
USPS Printer Directory Terms of Service

Please read these terms of service carefully in order to be included as a participant in this program. After USPS® has approved your application, you must sign in to your Business Customer Gateway account and electronically sign the below Terms of Service agreement.