N.Y. Civ. Rights Law § 55

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