CASS Certification

How to configure a dataflow to produce CASS certified output files and USPS CASS Form 3553 reports.

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.

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For more information on CASS contact the USPS National Customer Support center at https://postalpro.usps.com/support 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 USPS CASS Form 3553 report with the standardization software during processing and submit the completed form with the mailing.