N.Y. Pub. Off. Law § 8
The commission of every officer appointed by the governor, or by the governor by and with the consent of the senate, shall be signed by the governor and attested under the seal of this state, by the secretary of state, who shall make and record in his office a copy of such commission, and deliver the original to the officer appointed, by a messenger, if the governor shall so direct, and otherwise, by mail, or as the secretary of state shall deem proper. Commissions of notaries public shall be signed by the secretary of state, or by a person or persons in the department of state designated by the secretary of state, and shall be sent to the county clerk of the county in which such notaries public respectively reside. Commissions of commissioners of deeds in other states, territories and foreign countries, shall be signed by the secretary of state, or by a person or persons in the department of state designated by secretary of state. Every other appointment of an officer, made by one or more state officers, shall be in writing, and signed by the officer or officers, or by a majority of the officers, or by the presiding officer of the board or body making the appointment. Every such written appointment shall be deemed the commission of the officer appointed, and if of a state officer, a duplicate or a certified copy thereof shall be recorded in the office of the department of state; if of a local officer it shall be sent to the clerk of the county in which the officer appointed shall then reside, who shall file the same in his office, and notify the officer appointed of his appointment.
N.Y. Pub. Off. Law § 8