N.Y. County Law § 925

§ 925. Certificate of searching records and copies. The clerk of any\nof the counties comprising the city of New York, upon payment of the fee\nprescribed therefor, shall diligently search the files, papers, records\nand dockets in his office, when so requested, and make one or more\ntranscripts therefrom, and certify to the correctness thereof, or\ncertify that a document or paper, of which the custody legally belongs\nto him, cannot be found.\n