The National Change of Address (NCOA) is the United States Post Office (USPS) service that collects change of address information. This is the information that citizens provide when they move and fill out the change of address form at the USPS.

All of the change of address information is entered into the USPS's database, which is called the NCOA database, and maintained for 48 months. Licensed companies are allowed to compare names and addresses against this database (such as our AddressFinder service) to update the address with this move information.

Note: The NCOA database contains data for only those that fill out the NCOA card or online form with their new address. If the person does not fill out the card or online form, their new address will not be in the NCOA database. Therefore, when running an NCOA address update such as AddressFinder, it will only contain the address updates for people who submitted them to the USPS. The USPS keeps the NCOA cards for up to four years. Information on cards filled out more than four years ago are unavailable.