N.Y. C.P.L.R. 3118

Rule 3118. Demand for address of party or of person who possessed an\nassigned cause of action or defense. A party may serve on any party a\nwritten notice demanding a verified statement setting forth the post\noffice address and residence of the party, of any specified officer or\nmember of the party and of any person who possessed a cause of action or\ndefense asserted in the action which has been assigned. The demand shall\nbe complied with within ten days of its service.\n