On September 17, the New York Supreme Court, Appellate Division, affirmed a trial court’s decision to grant partial summary judgment in favor of four residential mortgage-backed securities (RMBS) trusts (plaintiffs) on breach of contract allegations related to pooling and servicing agreement (PSA) repurchase obligations. The appellate court also concluded that the trial court correctly denied a motion for summary judgment filed by the seller of the mortgage loans (defendant). At issue were PSAs—entered between the plaintiffs and the defendant—containing a “repurchase protocol,” which dictate that the defendant is required to “cure, substitute, or repurchase” any defective loans “within 120 days of the earlier of the discovery by the defendant . . . or [the defendant’s] receipt of written notice from any party of a breach of any representation or warranty in the PSAs which ‘materially and adversely affects’ the interest of certificateholders in any mortgage loan.” The trial court denied the defendant’s motion for summary judgment, which, among other things, sought dismissal of claims related to the defective loans that the defendant argued were not specifically identified in timely breach notices. According to the appellate court, the trial court had correctly held that the trustee had delivered “timely presuit letters” concerning the defective loans that were placed in the trusts and had provided sufficient “notice that the breaches plaintiffs were investigating might uncover additional defective loans for which claims would be made.” The appellate court also agreed with the trial court’s decision to grant the plaintiffs’ motion for partial summary judgment to the extent that it sought a ruling that a breach that “materially and adversely” affects the certificateholders’ interest—as outlined in the repurchase protocol—is not limited to loans in default, but also “applies to any breach that ‘materially increased a loan’s risk of loss.’” Further, the appellate court also concurred with the trial court’s decision to grant the plaintiffs’ motion for partial summary judgment and deny the defendant’s motion concerning the use of statistical sampling to prove breach of contract claims for both liability and damages. However, both courts agreed that the defendant will have an opportunity to raise those arguments if it chooses to challenge the sample size or the loans chosen as part of the sample.