The Texas Certificate of Last Known Address is a document issued by the Texas Department of Motor Vehicles (DMV) that serves as the official record of an individual's last known mailing address. It includes the name, address, and date of issuance. The certificate is used to update records with the most current address information for individuals who have moved from one address to another. There are two types of Texas Certificate of Last Known Address: 1. The Individual Certificate of Last Known Address, which is issued to a person who has changed their address within the past six months. 2. The Organizational Certificate of Last Known Address, which is issued to an organization, such as a business or nonprofit, which has changed its address within the past six months.