California Code, Labor Code - LAB § 1161

(c)(1) Notwithstanding Section 1519 of the Code of Civil Procedure, if the board has made a diligent effort to locate an employee on whose behalf the board has collected monetary relief pursuant to this part, and is unable to locate the employee or the lawful representative of the employee for a period of two years after the date the board collected the monetary relief, the board shall deposit those moneys in the fund.

(2) Moneys in the fund shall be used by the board to pay employees the unpaid balance of any monetary relief ordered by the board to be paid by an employer to an employee. Prior to making any payment from the fund, the board first shall make a finding that, in an individual case, the collection of the full amount of the monetary relief ordered is not possible after reasonable efforts have been made to collect the balance from the employer.