Haw. Rev. Stat. § 554B-5: Transfer to custodial trustee by fiduciary or obligor, facility of payment.

(a) Unless controlled by an instrument designating a custodial trustee under section 554B-3, a person, including a fiduciary other than a custodial trustee, who holds property of or owes a debt to an incapacitated individual not having a conservator may make a transfer to an adult member of the beneficiary's family or to a trust company as custodial trustee for the benefit of the incapacitated individual. If the property or obligation exceeds $20,000 in value, the transfer must be authorized by the court.

(b) The written acknowledgment of delivery signed by a custodial trustee constitutes a sufficient receipt and discharge for property transferred to the custodial trustee pursuant to this section.