What is CASS Certified Address Validation?

The CASS™ software certification program from the USPS provides hardware and software developers, service bureaus, and commercial mailers a common measure by which to test the quality of address-matching software. Software tests for CASS™ certification are graded by the U.S. Postal Service Addressing and Geospatial Technology (AGT) office and the results are returned to the developer to provide useful diagnostics for correcting software deficiencies. 

CASS™ enables the Postal Service™ to evaluate the accuracy of address matching software programs in the following areas.

• 5-digit coding
• ZIP + 4/ delivery point (DP) coding
• Carrier route coding
• DPV^® or DSF^2®
• LACS^Link®
• Suite^Link®
• eLOT^®
• RDI™

CASS™ allows developers, vendors, and mailers the opportunity to test their address-matching software packages, and after achieving a specified percentage of compliance to be certified by the Postal Service. CASS™ enables mailers to measure and diagnose commercially available address-matching software packages.

The following AccuZIP applications are CASS™ Cycle O Certified:

• AccuZIP6 Mailing Software
• AccuZIP Address Validation and NCOA^Link Software
• AccuZIP Address Validation Developers Toolkit
• AccuZIP CASS Point of Entry API
• AccuZIP Direct Mail API