Affidavit and Reaffirmation of Affidavit forms are available below in PDF format. My wife is submitting affidavits that are very similar to yours.The person who signs the Affidavit of Support is also called the "sponsor. Completing and signing Form I-864 makes you the sponsor. To view, complete, and print Circuit Court fill-in forms, you must have Adobe Acrobat installed on your computer. Completing the Form. One form of substitute document that you might need to use is what's called a "sworn declaration. Ideally the person writing the letter of support has known the couple since before the marriage and until the present time.