Decisions made about address quality affect your ability to reach
valued customers. Cost-effective and timely delivery of every
mail-piece depends on a valid address containing complete and
accurate address elements.

Each mailpiece presented by the mailer with an accurate valid
address allows the United States Postal Service to provide more
efficient mail processing and helps the mailer avoid wasted
expense and lost revenue due to undeliverable mail.

CASS Certified™ software used in conjunction with DPV™ and
LACS^Link™ is the primary essential tool designed to help business
mailers resolve addressing challenges and reduce costly
Undeliverable As Addressed (UAA) mail.

Small Efforts Can Reap Big Results!

The following resources provide information regarding the CASS™ certification requirements. Frequently asked questions, best known practices, and experiences will be shared through this site. Updates will be posted as necessary.

CASS™ Certification Requirements- A Mailer's Guide - created to assist mailers in understanding the CASS™ requirements effective on August 1, 2007.

CASS™ Certification Requirements- Frequently Asked Questions - created to share CASS questions received from the mailing industry, and answered by the addressing experts at the National Customer Support Center. UPDATED 06/04/07

CASS Technical Guide - technical information regarding address matching software requirements and testing procedures.

USPS LETTER TO CUSTOMERS RE: CASS CYCLE L IMPLEMENTATION - A letter from Anita Bizzotto, USPS Chief Marketing Officer and Executive Vice President and Charlie Bravo, USPS Senior Vice President, Intelligent Mail Address Quality with information regarding the CASS Cycle L implementation. This letter was provided to Software Developers and Service Providers on 2/7/07 for distribution to their mailing customers.

November/December Issue of Mailer's Companion - CASS™ article entitled No Need to Fear - CASS/DPV is Here!
(HTML link http://www.usps.com/mailerscompanion/novdec06/welcome.htm)
(PDF link http://www.usps.com/mailerscompanion/_pdf/novdec06.pdf)

MTAC Best Practices Report – Report created by MTAC Workgroup #97, Address Quality Methodology. The report includes twenty-seven best practices that represent short, medium, and long-term approaches to improving address quality.

Use of CASS Certified™ Software within Call Center Operations – Policy information regarding use of a CASS Certified software product to validate customer address information, in a call center operation.

Updating CASS Certified™ Address Lists – Policy information regarding automation qualification for new addresses add to existing lists.

If you have additional questions, please contact the National Customer Support Center CASS™ Certification department at 1-800-642-2914 or via email at CASSMAN.NCSC@USPS.GOV