CA Prob Code Section 3907

(a)

Subject to subdivisions (b) and (c), a person not subject to Section 3905 or 3906 who holds property of, or owes a liquidated debt to, a minor not having a conservator may make an irrevocable transfer to a custodian for the benefit of the minor pursuant to Section 3909.

(b)

If a person having the right to do so under Section 3903 has nominated a custodian under that section to receive the custodial property, the transfer shall be made to that person.

(c)

If no custodian has been nominated under Section 3903, or all persons so nominated as custodian die before the transfer or are unable, decline, or are ineligible to serve, a transfer under this section may be made to an adult member of the minor’s family or to a trust company unless the property exceeds ten thousand dollars ($10,000) in value.