AES offers an economical all-inclusive address management product including CASS software, delivery point validation DPV software and presort PAVE software that is USPS CASS certified for ZIP+4, Carrier Route, 5Digit, eLOT and DPV nationally as well as for Puerto Rico. AES has been USPS CASS certified since 1996. Address Enhancement Software has been designed specifically to take advantage of the USPS Automated Mail system. Its five components work together to provide a powerful yet economical mailroom management tool for any size business. AES is USPS CASS certified for ZIP+4, Carrier Route, 5Digit, eLOT and DPV nationally as well as for Puerto Rico. USPS CASS/DPV API Mailing Solution: Verify addresses during data-entry. Detecting addressing problems after mail is produced is costly. It has been estimated that mailers lose over two billion dollars annually on the cost of materials, labor and postage due to undeliverable mail. Existing applications can verify addresses during data entry by integrating Mail*SERVE CASS certification/DPV validation.