Cal. Probate Code § 3412

If the minor has a guardian of the estate and the sole asset of the guardianship estate is money, the court may order that the guardianship of the estate be terminated and, if the court so orders, the court in its discretion shall also order any one or more of the following: (a) That the money be deposited in an insured account in a financial institution in this state, or in a single-premium deferred annuity, subject to withdrawal only upon authorization of the court. (b) That all or any part of the money be transferred to a custodian for the benefit of the minor under the California Uniform Transfers to Minors Act, Part 9 (commencing with Section 3900). (c) If the money of the guardianship estate does not exceed twenty thousand dollars ($20,000), that the money be held on any other condition that the court in its discretion determines to be in the best interests of the minor. (d) If the money of the guardianship estate does not exceed five thousand dollars ($5,000), that all or any part of the money be paid to a parent of the minor, without bond, upon the terms and under the conditions specified in Article 1 (commencing with Section 3400). (e) That the remaining balance of any money paid or to be paid be deposited with the county treasurer, if all of the following conditions are met: (1) The county treasurer has been authorized by the county board of supervisors to handle the deposits. (2) The county treasurer shall receive and safely keep all money deposited with the county treasurer pursuant to this subdivision, shall pay the money out only upon the order of the court, and shall credit each estate with the interest earned by the funds deposited less the county treasurer’s actual cost authorized to be recovered under Section 27013 of the Government Code. (3) The county treasurer and sureties on the official bond of the county treasurer are responsible for the safekeeping and payment of the money. (4) The county treasurer shall ensure that the money deposited is to earn interest or dividends, or both, at the highest rate which the county can reasonably obtain as a prudent investor. (5) Funds so deposited with the county treasurer shall only be invested or deposited in compliance with the provisions governing the investment or deposit of state funds set forth in Chapter 5 (commencing with Section 16640) of Part 2 of Division 4 of Title 2 of the Government Code, the investment or deposit of county funds set forth in Chapter 4 (commencing with Section 53600) of Part 1 of Division 2 of Title 5 of the Government Code, or as authorized under Chapter 6 (commencing with Section 2400) of Part 4.