The Office of the Texas Secretary of State (the Office) is the only state agency authorized to issue certificates to authenticate Texas public records. Both documents must contain the individual's name and residential address.Addresses are assigned using the City's Addressing Grid which follows a formula of one address for every 50 feet in increments of four. We hand-carry your important documents to the Texas Secretary of State. Our same-day apostille service will get your documents apostilled fast! We provide Texas Secretary of State, U.S Department of State, and embassy document legalization, apostille, and authentication services in San Antonio, TX. A Certificate of Occupancy is required for all businesses in the city. Learn more about applying for a Certificate of Occupancy. Execution and Delivery Instructions. An Oath of Office that is required to be filed with the Office of the Secretary of State is considered filed.