N.Y. SCP Law § 2504

§ 2504. Wills to be retained after probate; exceptions\n 1. A written will which has been admitted to probate must remain in\nthe court, except where the will is on file in a court or public office\nof another state or country under the laws of which it cannot be\nremoved.\n 2. When it appears that the laws of another jurisdiction require the\nproduction of an original will before the provisions thereof become\neffective in such jurisdiction the court may cause any original will on\nfile in its office to be sent to any court which, or to any officer of\nsuch jurisdiction who, under the laws thereof, is empowered to receive\nthe will for probate, or may deliver the will to any person interested\nin the probate thereof in such jurisdiction or to his fiduciary in such\nmanner and upon such terms as it deems proper for the preservation of\nthe will and the protection of other parties interested in the estate.\n 3. In the case of a joint will which has been admitted to probate in\nthis state the court of such county may under such terms as it deems\nproper transmit the original joint will to the surrogate's court of any\nother county in this state for probate as the will of any other signer\nthereof. It shall be the duty of the court of such other county to keep\na true copy thereof in its office and thereafter to return the original\nwill to the surrogate's court of the county of original probate.\n