N.Y. Real Prop. Law § 419
A release, discharge or surrender of a charge or incumbrance, or any part thereof, or of any part of the property charged or incumbered, may be effected by the production of a release, discharge or satisfaction, duly executed and acknowledged, made in any form authorized by law, except as herein provided. Any tax, water rent or assessment, subject to which the title has been registered and which has been noted on the certificate of title as provided in section three hundred ninety of this chapter, may be released and discharged in the same way upon a receipt therefor being issued and duly certified by the receiver of taxes or collector of assessments and arrears or other duly authorized officer, as the case may require, and delivered to the registrar and filed in his office. The receiver of taxes or collector of assessments and arrears or such other duly authorized officer, as the case may require, upon demand of any owner of registered property, shall execute, certify and deliver to such owner such receipt when any such tax, water rent or assessment has been paid upon such registered property.
N.Y. Real Prop. Law § 419