2017 New York Laws
RPP - Real Property
Article 9 - Recording Instruments Affecting Real Property
294-A - Recording Assignments of Rent.

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