Once your auto vehicle is taken, the lender has to mail you a notice within 10 days explaining that your automobile has been repossessed. To fill out the Affidavit of Repossession, gather the required documents and information.Carefully complete the form, ensuring accuracy in all details. 1. Complete owner information. Give them your name, address and contact information. Tell the lender that you are voluntarily giving the item back because you can no longer make the payments. Entered into a contract to sell the car; or. The proper procedure is to submit a write with the county where you obtained the lien. 16 Affidavit of Repossession. 16 Affidavit of Repossession (PDF, 88.48 KB).