Except where otherwise prescribed by order of the court, an executor, administrator, guardian of the property of an infant, committee of the property of a judicially declared incompetent, conservator of the property of a conservatee, trustee of an express trust, insured person who has executed to his insurer either a loan or subrogation receipt, trust agreement, or other similar agreement, or person with whom or in whose name a contract has been made for the benefit of another, may sue or be sued without joining with him the person for or against whose interest the action is brought.
New York Legal Code