N.Y. Real Prop. Acts. Law § 308

§ 308. When certificate must be under seal. 1. When a certificate of\nacknowledgment or proof is made without this state, whether within or\nwithout the United States, (a) if made by a judge or other presiding\nofficer of a court having a seal, or by the clerk or other certifying\nofficer thereof, such certificate must be under the seal of such court;\n(b) if made by a commissioner of deeds appointed pursuant to the laws of\nthis state to take acknowledgments or proofs without this state, such\ncertificate must be under his seal of office; (c) if made by any officer\nspecified in subdivision one of section three hundred one of this\nchapter, such certificate must be under the seal of the legation or\nconsulate to which such officer is attached.\n 2. Any certificate, required by the provisions of section three\nhundred eleven of this chapter to be authenticated, must be so\nauthenticated, in addition to being under seal as provided in this\nsection.\n