Tech Guides
05/08/2024
ACS™ Electronic Product Fulfillment (EPF) Download Manager Technical Guide

Documentation for the Client Side ACS™ EPF Download Manager software package.

Tech Guides
03/20/2024
Informed Delivery Mail.XML Mailer Guide

This is a guide for submitting campaigns to PostalOne! via Mail.XML electronic documentation (eDoc).

Tech Guides
03/20/2024
Informed Delivery Mail.dat Mailer Guide

This is a mailer guide for creating campaigns via PostalOne! through Mail.dat eDoc submission.

Tech Guides
03/19/2024
MASS™ Technical Guide for Cycle O

This document provides a technical guide for MASS™ Cycle O. MASS™ is an extension of the CASS™ system.

Tech Guides
03/19/2024
CASS™ Technical Guide for Cycle O

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 and deliverability of addresses for mail qualifying for postal discounts.

Tech Guides
03/18/2024
Known Issues List 3-18-2024
Tech Guides
03/06/2024
Guide to USPS Ship for New Shippers
Tech Guides
03/06/2024
Guide to USPS Ship for eVS Shippers
Tech Guides
02/21/2024
Known Issues List 2-21-2024
Tech Guides
02/09/2024
Publication 205 Electronic Verification System (eVS®) Business and Technical Guide