CASS certification

Details about CASS Certification, CASS Report, Obtaining USPS CASS certification for applications, and Modifying the CASS 3553 report template

CASS certification overview

The USPS® Coding Accuracy Support System (CASS™) is a service offered to mailers, service bureaus, and software vendors that improves the accuracy of delivery point codes, ZIP+4 Codes, 5-digit ZIP Codes, and carrier route information on mail. CASS provides a common platform to measure the quality of address matching software and useful diagnostics to correct software problems.

Note: For more information on CASS contact the USPS National Customer Support center at http://ribbs.usps.gov/files/cass/ or 1-800-642-2914.

To receive greater discounts on bulk mail postage, you can process your address list with USPS-certified address standardization software; referred to as CASS certification. To qualify for the CASS certification™ discount, you must generate a CASS report with the standardization software during processing and submit the completed form with the mailing.