N.Y. Comp. Codes R. & Regs. tit. 22, § 603.33
(a) Every attorney appearing for an adoptive parent, a natural parent or an adoption agency in an adoption proceeding in the courts within this judicial department shall, prior to the entry of an adoption decree, file with the Office of Court Administration of the State of New York, and with the court in which the adoption proceeding has been initiated, a signed statement under oath setting forth the following information:
(c) Such statement may be filed personally by the attorney or his representative at the main office of the Office of Court Administration in the City of New York, and upon such filing he shall receive a date-stamped receipt containing the code number assigned to the original so filed. Such statement may also be filed by ordinary mail addressed to:
Office of Court Administration—Adoption Affidavits
Post Office Box No. 2016
New York, NY 10008