Fill out the blank Small Estates Affidavit in this packet in front of a notary. Sign it when the notary tells you to.Use this form if you have inherited a vehicle or vessel or were awarded one through litigation. Permanent legal residence . To file an Affidavit of Inheritance, you must be at least 18 years old and be able to show that you are the rightful heir to the property in question. Decedent left a Last Will and Testament which HAS NOT been Probated or Revoked. This affidavit provides a streamlined process for successors to collect personal property of a decedent.