2010 New York Code
RPP - Real Property
Article 9 - (290 - 336) RECORDING INSTRUMENTS AFFECTING REAL PROPERTY
304 - Proof by subscribing witness.

§  304.  Proof  by  subscribing  witness.  When  the  execution  of  a
  conveyance is proved by a subscribing witness, such witness  must  state
  his  own place of residence, and if his place of residence is in a city,
  the street and street number, if any  thereof,  and  that  he  knew  the
  person  described in and who executed the conveyance. The proof must not
  be taken unless the officer is personally acquainted with such  witness,
  or  has  satisfactory  evidence  that  he  is the same person, who was a
  subscribing witness to the conveyance.