You may have a large database of contacts. However, if that database is not kept in good shape you could be losing opportunities as well as postal discounts with every mailing. That is where list processing, also known as data hygiene, becomes important. Incorrect or out-of-date addresses cost you money. Our list processing services deliver a greater return on marketing investment through various data services such as USPS address verification, de-duplication, National Change of Address service, and various forms of data appending.