N.Y. C.P.L.R. 1004

§ 1004. When joinder unnecessary. Except where otherwise prescribed by\norder of the court, an executor, administrator, guardian of the property\nof an infant, committee of the property of a judicially declared\nincompetent, conservator of the property of a conservatee, trustee of an\nexpress trust, insured person who has executed to his insurer either a\nloan or subrogation receipt, trust agreement, or other similar\nagreement, or person with whom or in whose name a contract has been made\nfor the benefit of another, may sue or be sued without joining with him\nthe person for or against whose interest the action is brought.\n