A recent appellate decision in HSBC Bank USA, N.A. v Rini, 2026 Slip Op. 084845, highlights an important reminder about the finality of settlement paperwork: once a case is properly discontinued, a court may lose the power to bring it back, even if one side later claims the other broke the deal.

The case involved a mortgage foreclosure action. After years of litigation, including a prior appeal over whether the defendant had been properly served, the parties reached a conditional settlement that included a loan modification for the defendant. The court noted on the record that it would retain jurisdiction over the case going forward.

However, the parties later signed and filed a formal stipulation of discontinuance, a separate document in which the plaintiff withdrew the complaint, the defendant withdrew her answer and counterclaims, and all claims in the case were discontinued. This stipulation said nothing about the court retaining jurisdiction for any purpose.

Months later, the plaintiff went back to court, arguing that the defendant never completed the loan modification paperwork required under their earlier settlement, and asked the court to vacate the stipulation and reopen the case. The trial court agreed to hold a hearing on the issue and the defendant appealed.

The appellate court sided with the defendant, holding that the trial court never had jurisdiction to consider the plaintiff’s motion in the first place. Under well-established New York law, a court loses jurisdiction over an action once the parties have signed an express, unconditional stipulation of discontinuance, unless that stipulation specifically states that the court is retaining jurisdiction for some purpose or a judgment has already been entered on the settlement’s terms.

Here, the stipulation of discontinuance was unconditional. It withdrew the complaint and all claims outright, and it made no mention of the court retaining any ongoing authority over the case. The fact that the parties had earlier discussed the court retaining jurisdiction over the conditional settlement didn’t matter, because that understanding was never carried over into the stipulation that was signed and filed.

As a result, once that stipulation was filed, the case was over as far as the court was concerned. The plaintiff’s only path forward, if they believed the defendant breached the settlement agreement, was to commence an entirely new lawsuit.

This decision underscores how much weight a stipulation of discontinuance carries, and how important it is that the actual language of that document reflects the parties’ full intent. Even where a settlement is conditional or contingent on future steps, once an unconditional stipulation of discontinuance is signed and filed without a jurisdiction-retention clause, the parties generally cannot go back to that same court to enforce the deal by motion. If one side later fails to follow through, the other side’s remedy is typically a new, separate lawsuit.

Anyone entering into a settlement should ensure that any stipulation of discontinuance explicitly addresses whether the court is retaining jurisdiction to enforce the agreement. Leaving that detail out can have significant consequences if the settlement later breaks down.

Giulia R. Marino, Esq.