ncoalink is a product of the united states postal service, usps, and is used to provide updated and accurate addresses for individuals, families, and businesses. it will also indicate foreign moves and people who have moved with no forwarding address. the usps offers licenses for interface developers and interface distributors and all ncoalink interfaces are certified by the usps. the addresses in the database are specifically designed to match the usps requirements. each entry is matched against other entries to ensure that there are no repeated addresses. the software will update old addresses through the information provided by the postal service. consumers have the option of changing their address online or filling out the "change of address" form at the post office when moving.