N.Y. Real Property Law § 306: Certificate of acknowledgment or proof

§ 306. Certificate of acknowledgment or proof. A person taking the

acknowledgement or proof of a conveyance must indorse thereupon or

attach thereto, a certificate, signed by himself, stating all the

matters required to be done, known, or proved on the taking of such

acknowledgement or proof; together with the name and substance of the

testimony of each witness examined before him, and if a subscribing

witness, his place of residence.

Any conveyance which has heretofore been recorded, or which may

hereafter be recorded, shall be deemed to have been duly acknowledged or

proved and properly authenticated, when ten years have elapsed since

such recording; saving, however, the rights of every purchaser in good

faith and for a valuable consideration deriving title from the same

vendor or grantor, his heirs or devisees, to the same property or any

portion thereof, whose conveyance shall have been duly recorded before

the said period of ten years shall have elapsed.