Coding Accuracy Support System (CASS): CASS-certified address matching software will help standardize your addresses and update your files with ZIP+4 codes. You can get CASS-certified software from numerous mail service providers or have your own software CASS-certified. Having ZIP+4 codes on your mail improves the speed and efficiency of your mail delivery and can reduce postage prices.
Delivery Point Validation (DPV): DPV can confirm the existence of an address on a mailing list as a valid delivery point and helps you identify inaccurate or incomplete addresses. You must use the DPV product in conjunction with CASS-certified address matching software. DPV is available from various vendors or can be acquired by the end user.
Address Element Correction (AEC): AEC is an entirely computerized address correction process which uses logic routines to assist in ZIP+4 coding previously un-coded addresses, allowing mail to qualify for discounted automation prices.
Address Element Correction II (AEC II): AEC II is for addresses that AEC cannot resolve electronically. In AEC II, addresses are sent to delivery personnel, carriers, and clerks in local Post Offices for resolution..
