The relation-back doctrine allows a party to be added to an action after the expiration of the statute of limitations, and the claim is deemed timely interposed, if (1) the claim arises out of the same conduct, transaction, or occurrence; (2) the additional party is united in interest with the original party; and (3) the additional party knew or should have known that but for a mistake by the plaintiff as to the identity of the proper parties, the action would have been brought against the additional party as well. The linchpin of the relation-back doctrine is whether the new defendant had notice within the applicable limitations period.
Norton v. County of Westchester, NY Slip Op 04729 (2d Dep't August 20, 2025)
