California Code, Unemployment Insurance Code - UIC § 1382

No person shall be liable for the amount of benefits received for any period for which the person also received an award or settlement of backpay resulting from an action or grievance for wrongful discharge, if the amount of the backpay award or settlement was reduced by the amount of benefits received pursuant to this part. When the amount of the backpay award or settlement was reduced by the amount of benefits received, the employer shall pay to the Unemployment Fund an amount equal to the amount subtracted from the backpay award or settlement for benefits received by the person in order to reimburse the fund. When an individual has been awarded or receives backpay, the amount of the backpay shall constitute wages paid in the period for which it is awarded.

A mediator or arbitrator who is a party to the backpay award or settlement shall, within 30 days of the settlement, report to the department the name and address of the employer, the amount of benefits by which the award or settlement was reduced, and the name and social security number of the person who received the award or settlement.