General Affidavits are written statements of fact used to support your case or verify facts that are sworn to be true in front of a notary public. The Office of the Texas Secretary of State (the Office) is the only state agency authorized to issue certificates to authenticate Texas public records.Instructions for completing an Absent Applicant Affidavit. ALL Affidavit's must be Notarized. George L. Allen, Sr. Courts Building - 600 Commerce Street, Suite 103, Dallas, TX 75202. Please review the instructions listed on our Request an Apostille page. We provide Texas Secretary of State, U.S Department of State, and embassy document legalization, apostille, and authentication services in Dallas, TX.