N.Y. CPL Law § 530.80

§ 530.80 Order of recognizance or bail; surrender of defendant.\n 1. At any time before the forfeiture of a bail bond, an obligor may\nsurrender the defendant in his exoneration, or the defendant may\nsurrender himself, to the court in which his case is pending or to the\nsheriff to whose custody he was committed at the time of giving bail, in\nthe following manner:\n (a) A certified copy of the bail bond must be delivered to the\nsheriff, who must detain the defendant in his custody thereon, as upon a\ncommitment. The sheriff must acknowledge the surrender by a certificate\nin writing, and must forthwith notify the court in which the case is\npending that such surrender has been made.\n (b) Upon the bail bond and the certificate of the sheriff, or upon\nthe surrender to the court in which the case is pending, such court\nmust, upon five days notice to the district attorney, order that the\nbail be exonerated. On filing such order, the bail is exonerated\naccordingly.\n 2. For the purpose of surrendering the defendant, an obligor or the\nperson who posted cash bail for the defendant may take him into custody\nat any place within the state, or he may, by a written authority\nindorsed on a certified copy of the bail bond, empower any person over\ntwenty years of age to do so.\n 3. At any time before the forfeiture of cash bail, the defendant may\nsurrender himself or the person who posted bail for the defendant may\nsurrender the defendant in the manner prescribed in subdivision one. In\nsuch case, the court must order a return of the money to the person who\nposted it, upon producing the certificate of the sheriff showing the\nsurrender, and upon a notice of five days to the district attorney.\n