The death of a party divests the court of jurisdiction and stays the proceedings until a proper substitution has been made, pursuant to CPLR 1015 (a), and any determination rendered without such substitution will generally be deemed a nullity. The death of a party also terminates an attorney's authority to act on behalf of the deceased party.
The determination of a motion for substitution pursuant to CPLR 1021 brought by the successors or representatives of a party or by any party is an exception to the court's lack of jurisdiction upon the death of a party. CPLR 1021 provides that a motion for substitution may be made by any party to the action, and that such a motion must be made within a reasonable time. The determination of reasonableness requires consideration of several factors, including the diligence of the party seeking substitution, the prejudice to the other parties, and whether it has been shown that the action or defense has potential merit. Even if the explanation for the delay is not satisfactory, the court may grant the motion for substitution if there is no showing of prejudice and there is potential merit to the action or defense, in light of the strong public policy in favor of disposing of matters on the merits.
Lee v. Leeds, Morelli & Brown, P.C., NY Slip Op 06624 (2d Dep't December 24, 2024)