New York Consolidated Laws, Uniform Commercial Code - UCC § 3-803. Notice to Third Party

Where a defendant is sued for breach of an obligation for which a third person is answerable over under this Article he may give the third person written notice of the litigation, and the person notified may then give similar notice to any other person who is answerable over to him under this Article.  If the notice states that the person notified may come in and defend and that if the person notified does not do so he will in any action against him by the person giving the notice be bound by any determination of fact common to the two litigations, then unless after seasonable receipt of the notice the person notified does come in and defend he is so bound.