What is CASS and what is it for?
CASS certification is designed in cooperation with the mailing industry to improve the accuracy of postal automation. CASS implies the existence of an address by validating the range of a street number. It provides a common measure by which to test the quality of address matching software and also addresses known deficiencies common across software products that require correction. Melissa Data CASS software is tested annually with a USPS provided test file to verify that sufficient overall percentage (98%) of the output addresses are coded correctly.