N.Y. Uniform Commercial Code Law § 3-803: Notice to Third Party

Section 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.