N.Y. U.C.C. 3-803

Section 3--803. Notice to Third Party.\n Where a defendant is sued for breach of an obligation for which a\nthird person is answerable over under this Article he may give the third\nperson written notice of the litigation, and the person notified may\nthen give similar notice to any other person who is answerable over to\nhim under this Article. If the notice states that the person notified\nmay come in and defend and that if the person notified does not do so he\nwill in any action against him by the person giving the notice be bound\nby any determination of fact common to the two litigations, then unless\nafter seasonable receipt of the notice the person notified does come in\nand defend he is so bound.\n