CASS™ certification - QAS online glossary

Definition:
The Coding Accuracy Support System, or CASS™, is a system designed to improve the accuracy of the address and ZIP Code™ that appears on each item in a bulk mailing.

Mailings that are CASS Certified™ are eligible for certain bulk mail postage discounts. In order to become CASS Certified, the mailing list must be run through a software program approved by the USPS®.

Any software that correctly formats addresses and includes accurate ZIP + 4® is eligible for CASS certification, but to qualify it must achieve:

• a 98.5% or higher match rate for ZIP + 4 codes and carrier route numbers.
• 100% for delivery point bar code extension numbers.

It is important to note that CASS certification only handles the proper ZIP Code, not primary or secondary information. Therefore, a CASS Certified piece of mail may arrive in the correct city, state and ZIP but not at the correct residence because of a nonexistent house or apartment number.

Related links to CASS Certification

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