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. 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. My name is___________________________________________. I am of sound mind, 18 years of age or older, and competent to give this affidavit. I am ____ years of age, and my date of birth is: . Verify statements for legal matters and business transactions using our Texas general affidavit form template. In this lesson, you will learn what an affidavit is and how to format one. You'll also review a sample template that can be used to construct an affidavit.