N.Y. Abandoned Property Law § 1220

§ 1220. Service. The notice shall be served\n (a) by first class mail on all known respondents for whom there is a\nlast known address; and\n (b) by publication on unknown respondents and known respondents for\nwhom there is no last known address in the manner provided in\nsubdivision two of section twelve hundred six of this chapter; and\n (c) by first class mail, together with a copy of the petition, on the\nclerk, registrar or other officer in charge of the agency, department,\ninstrumentality or corporation having possession, custody or control of\nsuch property, together with a statement that no personal claim is made\nagainst him.\n