What is the difference between first class automated card and unsorted card?

First class automated cards qualify for automation rate postage discounts because they're being mailed to standardized addresses. Standardized addresses are recognized as delivery addresses by USPS Cass Certified software.

Unsorted cards do not qualify for automation rate postage discounts because they're being mailed to nonstandard addresses. Nonstandard addresses can't be verified as valid delivery addresses by USPS Cass Certified software.