N.Y. Real Prop. Acts. Law § 306

§ 306. Certificate of acknowledgment or proof. A person taking the\nacknowledgement or proof of a conveyance must indorse thereupon or\nattach thereto, a certificate, signed by himself, stating all the\nmatters required to be done, known, or proved on the taking of such\nacknowledgement or proof; together with the name and substance of the\ntestimony of each witness examined before him, and if a subscribing\nwitness, his place of residence.\n Any conveyance which has heretofore been recorded, or which may\nhereafter be recorded, shall be deemed to have been duly acknowledged or\nproved and properly authenticated, when ten years have elapsed since\nsuch recording; saving, however, the rights of every purchaser in good\nfaith and for a valuable consideration deriving title from the same\nvendor or grantor, his heirs or devisees, to the same property or any\nportion thereof, whose conveyance shall have been duly recorded before\nthe said period of ten years shall have elapsed.\n