New York Civil Practice Law & Rules Section 1004 - When joinder unnecessary.

 1004. When joinder unnecessary. 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.

Last modified: February 3, 2019