N.Y. RPP Law § 294-A

§ 294-a. Recording assignments of rent. 1. An assignment of rent to\naccrue from tenancies, subtenancies, leases or subleases of real\nproperty, irrespective of the term of their duration, in existence at\nthe time of the assignment, made, subscribed and acknowledged or proved,\nand certified in a manner to entitle a conveyance to be recorded may be\nrecorded in the office of the recording officer of any county in which\nany of the real property to which the tenancies, subtenancies, leases or\nsubleases relate is situated, and such recording officer shall, upon the\nrequest of any party, on tender of the lawful fees therefor, record the\nsame in his said office.\n 2. Every such assignment not so recorded shall be void as against any\nperson who subsequently purchases or acquires by exchange, or contracts\nto purchase or acquire by exchange, the same real property, or any\nportion thereof, or acquires by assignment the rent to accrue therefrom\nas provided in this section, in good faith and for a valuable\nconsideration, from the same vendor or assignor, his distributees or\ndevisees, and whose conveyance, contract or assignment is first duly\nrecorded.\n 3. The recording of such assignment shall not be in itself a notice of\nthe assignment to a lessee or tenant, his distributees or devisees, so\nas to invalidate a payment of rent made by the lessee or tenant, his\ndistributees or devisees, to the assignor or a prior assignee of the\nrent.\n