CASS certification improves the accuracy of carrier route, 5-digit ZIP™, ZIP + 4®, and delivery point codes that appear on mail pieces. The program is a quality-control measure that ensures that software vendors provide accurate, updated information and software to customers who purchase this information to process their mailing lists. CASS is available to all mailers, service bureaus, and mailing software vendors who want to evaluate their address-matching software and improve the quality of their ZIP + 4, carrier route, and 5-digit coding accuracy. The USPS® National Customer Support Center administers and grades the mailers' tests and then returns the results so mailers can diagnose and correct deficiencies.

CASS enables the Postal Service™ to evaluate the accuracy of address-matching software programs in three areas: 1) ZIP + 4 delivery point coding, 2) carrier route coding, and 3) 5-digit coding. CASS Certified™ software allows vendors/mailers the opportunity to test their address-matching software and, after achieving a minimum percentage of accuracy, be certified by the Postal Service. However, CASS does not measure the accuracy of ZIP + 4 delivery point, 5-digit ZIP, or carrier route codes in a mailer's existing files. CASS certification enables mailers to measure and diagnose internally written, commercially-available address-matching software packages. The effectiveness of service bureaus' matching software can also be measured.

Click here to see BCC Software's most current CASS certification for its CASS Certified™ software products.