What is the CASS used for in mail processing?

The CASS, or Coding Accuracy Support System, is utilized in mail processing primarily to enhance the accuracy of address coding. By validating and standardizing addresses according to postal service requirements, CASS helps ensure that mail is coded correctly for delivery. This process is crucial for optimizing the efficiency of mail sorting and delivery, as accurate address coding reduces the likelihood of mail undeliverability due to incorrect or incomplete addresses.

This quality control system verifies address details against a database maintained by postal authorities. As a result, mailers can avoid common errors, reduce mailing costs, and decrease the chances of delays in mail delivery. The other choices focus on different aspects of mail processing that, while important, do not align with the specific function of CASS in maintaining address coding accuracy.