What is the Coding Accuracy Support System (CASS)?

CASS (Coding Accuracy Support System) is a formal certification process that the United States Postal Service (USPS) requires bulk mailers to complete before sending mail. During CASS processing, addresses are run through address-cleansing software that fixes typos, punctuation errors, and spelling mistakes, and formats them according to USPS guidelines.

CASS also applies a barcode - called a USPS Intelligent Mail barcode (IMb), also known as a OneCode barcode - above the billing address on printed bills. This barcode is used by USPS for sorting and tracking.

How to verify a customer address

Use the Look Up a ZIP Code tool to confirm your customer's address. If the address is not correct in this database, your customer must contact USPS to have the address updated.

Keying errors and missing information are the most common reasons that addresses cannot be certified. Periodically run the Uncertified Addresses report in Client Connect to learn which address barcodes can't be assigned.

Encourage customers to use electronic billing (email/ebill) whenever possible, as this helps prevent USPS issues.

Can I bypass CASS?

Yes, Bypass CASS allows a specific subset of accounts to skip the CASS address-standardization process. This is useful when a small number of accounts have addresses that are not processed correctly by CASS, for example, if mail to a particular address is consistently undeliverable when run through CASS.

When Bypass CASS is enabled for an account, Billtrust will not run that account's documents through the CASS process. All other accounts continue through CASS normally.

Note: Bypass CASS is a billable request handled by Billtrust's Document Modification Team.

To request Bypass CASS for an account, open a case with Billtrust Customer Support through the Support Portal.