16 Exemption of third person from liability A third person in good faith and without court order may act on the instructions of or otherwise deal with any person purporting to make a transfer or purporting to act in the capacity of a custodian and, in the absence of knowledge, is not responsible for determining: (a) the validity of the purported custodian's designation; (b) the propriety of, or the authority under this part for, any act of the purported custodian; (c) the validity or propriety under this part of any instrument or instructions executed or given either by the person purporting to make a transfer or by the purported custodian; or (d) the propriety of the application of any property of the minor delivered to the purported custodian.
New York Legal Code