After the Affidavit of Service is done, it must be filed with the Court. A. BIOGRAPHICAL INFORMATION: Fill in your.An affidavit is a sworn statement of fact that can be used in a variety of legal proceedings, from bankruptcy cases to family and civil litigation matters. An affidavit of heirship is a document that identifies anyone who may have a legal claim to inherit the decedent's assets or property. You have to ask the New York State Supreme Court to change your name. To access required forms, click on the drop-down menu next to your name in the upper-right-hand corner of the screen. What is an affidavit? Affidavits are written statements of facts, sworn or affirmed to be true and correct, and filed in court before your hearing.