N.Y. SCP Law § 1922

§ 1922. Conclusive presumption after 10 years.\n An action or proceeding to set aside any disposition of the real\nproperty of a decedent pursuant to an order granted under this article\nor under article 13 of the surrogate's court act by reason of lack of\njurisdiction over any person interested in the estate or by reason of\nany other defect in the procedure must be brought within 10 years after\nthe date of the order or within 1 year after the effective date of this\narticle, whichever date is later. After the lapse of such period the\npresumption that the order was regular in all respects and that the\ncourt had jurisdiction of all persons interested in the estate becomes\nconclusive.\n