2006 New York Code - Anonymous Communications Prohibited.

 
    §  55.  Anonymous  communications prohibited. It shall be unlawful for
  any such corporation or association to send, deliver, mail  or  transmit
  to  any  person in this state who is not a member of such corporation or
  association any anonymous letter, document, leaflet or other written  or
  printed  matter,  and  all  such  letters,  documents, leaflets or other
  written or printed matter, intended for a person not a  member  of  such
  corporation  or  association,  shall  bear  on the same the name of such
  corporation or  association  and  the  names  of  the  officers  thereof
  together with the addresses of the latter.