After the Affidavit of Service is done, it must be filed with the Court. A. BIOGRAPHICAL INFORMATION: Fill in your.The petition, affirmation or affidavit must state the result of any prior application for the same relief. The OSC must be double-spaced. The undersigned affiant,. Type or write your complete legal name in the appropriate section, which is usually labeled "custodian's name. 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. This guide provides links to primary and secondary sources of law and government websites for New York, New York City, and Westchester County. Intheblanks form required for any matter originating and electronically filed in Supreme or Surrogate's Courts in Richmond County. An affidavit of heirship is a document that identifies anyone who may have a legal claim to inherit the decedent's assets or property.