Cal. Bus. & Prof. Code § 10146
Any real estate broker who contracts for or collects an advance fee from any other person, hereinafter referred to as the "principal," shall deposit any such amount or amounts, when collected in a trust account with a bank or other recognized depository. Such funds are trust funds and not the funds of the agent. Amounts may be withdrawn therefrom for the benefit of the agent only when actually expended for the benefit of the principal or five days after the verified accounts mentioned hereinafter have been mailed to the principal. Upon request of the commissioner, a broker shall furnish to the commissioner an authorization for examination of financial records of the trust account in accordance with the procedures set forth in Section 7473 of the Government Code.
The commissioner may issue such rules and regulations as he or she deems necessary to regulate the method of accounting, and to accomplish the purpose of the provisions of this code relating to advance fees including, but not limited to, establishing forms for and determining information to be included in such accountings. Each principal shall be furnished a verified copy of such accountings at the end of each calendar quarter and when the contract has been completely performed by the licensee. The commissioner shall be furnished a verified copy of any account or all accounts on his or her demand therefor.
Where advance fees actually paid by or on behalf of any principal are not handled in accordance with the preceding paragraph, it shall be presumed that the agent has violated Sections 506 and 506a of the Penal Code. The principal may recover treble damages for amounts so misapplied and shall be entitled to reasonable attorney's fees in any action brought to recover the same.
Ca. Bus. and Prof'l. Code § 10146