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Coding Accuracy Support System

The Coding Accuracy Support System (CASS) improves the accuracy of USPC carrier route, five-digit ZIP, ZIP+4, and delivery point codes that appear on mail pieces. Mail Technologies has passed a two-part test to certify that our software and our procedures enhance address accuracy.



We have been graded by the United States Postal Service's National Customer Support Center (NCSC), and evaluated for the accuracy of our address-matching software programs in three areas:

  • ZIP+4 Delivery Point Coding
  • Carrier Route coding
  • Five-Digit Coding