New address information that is in use, but not yet available on the ZIP + 4 File, can be found as part of the CASS Department's Early Warning System (EWS). These new or changed addresses can be found at the USPS website https://postalpro.usps.com/. The USPS updates the EWS File weekly. You can download the EWS File from the USPS website. Precisely includes a monthly update of the EWS File with the database updates.
USPS CASS regulations require all CASS-certified software to be able to read the USPS EWS File. The Finalist EWS Option verifies input addresses that are not found in the current ZIP + 4 File against the USPS EWS File. If an input address is found in the EWS File, the input address is not matched to any similar addresses in the current ZIP + 4 File. Instead, the input address fails and is not coded until the ZIP + 4 File is updated with the correct address from the USPS EWS File.
For example, your input file contains the address "100 S. Bonnie Ct". Finalist does not find an exact match on the current ZIP + 4 File. The current ZIP + 4 File contains the address range 100 - 198 Bonnie Ave. Finalist would normally code the address as "100 Bonnie Ave". If Finalist finds values for "S Bonnie Ct" for the input ZIP Code in the EWS File, CASS regulations require Finalist to fail the address and not update the address until the USPS adds the valid address to the ZIP + 4 File.