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.

Data Files
09/07/2023
Fact Sheets
03/31/2023
Data Files
06/10/2022
Stage I Known Errors

The file contains known Stage I errors with a comment at the end of each record.

Fact Sheets
04/26/2022
TotalDPS – Programmer Specs

This document provides information for calculating TotalDPS.

Announcements
04/26/2022
Modifications to TotalDPS – Programmers Specs file

Changes made to the Total DPS document

Data Files
03/31/2022
CASS™ Cycle O - Stage I File

This file only contains CASS™ Cycle O enhancements.

Data Files
02/04/2022
DPV® & DSF2® Return Codes and Footnote Possibilities

This file contains sample addresses that include the DPV/DSF2 Return Codes and Footnotes.