A properly completed, notarized general affidavit form can be useful in legal proceedings. Here's how to make sure your affidavit is valid in Texas.For notaries commissioned or recommissioned on and after January 1, 2016, the seal must also contain the notary public's Secretary of State ID number. My name is___________________________________________. I am of sound mind, 18 years of age or older, and competent to give this affidavit. 1. Fill out the cause number and heading information. An affidavit is a sworn or affirmed statement made before a notary public or any public official who has the authority to administer oaths. Download the Texas residency affidavit for free. Fill in the template, sign and notarize online with PandaDoc.