Cal. Code of Civil Procedure § 704.160

(a) Except as provided by Chapter 1 (commencing with Section 4900) of Part 3 of Division 4 of the Labor Code, before payment, a claim for workers’ compensation or workers’ compensation awarded or adjudged is exempt without making a claim. Except as specified in subdivision (b), after payment, the award is exempt. (b) Notwithstanding any other provision of law, during the payment of workers’ compensation temporary disability benefits described in subdivision (a) to a support judgment debtor, the support judgment creditor may, through the appropriate local child support agency, seek to apply the workers’ compensation temporary disability benefit payment to satisfy the support judgment as provided by Section 17404 of the Family Code. (c) Notwithstanding any other provision of law, during the payment of workers’ compensation temporary disability benefits described in subdivision (a) to a support judgment debtor under a support judgment, including a judgment for reimbursement of public assistance, the judgment creditor may, directly or through the appropriate local child support agency, seek to apply the temporary disability benefit payments to satisfy the support judgment by an earnings assignment order for support, as defined in Section 5208 of the Family Code, or any other applicable enforcement procedure. The amount to be withheld pursuant to the earnings assignment order for support or other enforcement procedure shall be 25 percent of the amount of each periodic payment or any lower amount specified in writing by the judgment creditor or court order, rounded down to the nearest dollar. Otherwise, the amount to be withheld shall be the amount the court determines under subdivision (c) of Section 703.070. The paying entity may deduct from each payment made pursuant to an order assigning earnings under this subdivision an amount reflecting the actual cost of administration of this assignment, up to two dollars ($2) for each payment. (d) Unless the provision or context otherwise requires, the following definitions govern the construction of this section. (1) “Judgment debtor” or “support judgment debtor” means a person who is owing a duty of support. (2) “Judgment creditor” or “support judgment creditor” means the person to whom support has been ordered to be paid. (3) “Support” refers to an obligation owing on behalf of a child, spouse, or family; or an amount owing pursuant to Section 17402 of the Family Code. It also includes past due support or arrearage when it exists.