California Code, Education Code - EDC § 24802

(a) Notwithstanding any other provision of law, whenever any warrant drawn in payment of contributions or accumulated contributions or benefits under a district retirement system, remains unclaimed or the claimant cannot be found, the proceeds of the warrant shall be redeposited in the respective fund, or funds, from which they were derived, and held for the claimant, without further accumulation of interest, and the redeposit shall not operate to reinstate the membership of the claimant in the district retirement system. If the proceeds, whether heretofore or hereafter redeposited, are not claimed within four years after the date of redeposit, they shall revert to and become a part of the contributions of the district and shall be applied to reduce the cost to the taxpayers of the district maintaining the retirement system and on account of which the contributions were made.

(b) The provisions of this section shall apply to warrants drawn under a district retirement system and that would become void under Section 85270.

(c) The district retirement system may at any time, after the reversion of proceeds to the district maintaining the retirement system, and upon receipt of proper information satisfactory to it, return from district contributions, an amount equal to those proceeds, to the credit of the claimant to be administered in the manner prescribed under the district retirement system.

(d) The deposit in those funds of the proceeds of unclaimed and unpaid warrants prior to September 7, 1955, in accordance with the procedure specified in this section, is hereby validated, ratified, and confirmed.