California Code, Family Code - FAM § 5235

(a) The employer shall continue to withhold and forward support as required by the assignment order until served with notice terminating the assignment order. If an employer withholds support as required by the assignment order, the obligor shall not be held in contempt or subject to criminal prosecution for nonpayment of the support that was withheld by the employer but not received by the obligee. If the employer withheld the support but failed to forward the payments to the obligee, the employer shall be liable for the payments, including interest, as provided in Section 5241.

(b) Within 10 days of service of a substitution of payee on the employer, the employer shall forward all subsequent support to the governmental entity or other payee that sent the substitution.

(c) The employer shall send the amounts withheld to the obligee within the timeframe specified in federal law and shall report to the obligee the date on which the amount was withheld from the obligor's wages.

(d) The employer may deduct from the earnings of the employee the sum of one dollar and fifty cents ($1.50) for each payment made pursuant to the order.

(e) Once the State Disbursement Unit as required by Section 17309 is operational, the employer shall send all earnings withheld pursuant to this chapter to the State Disbursement Unit instead of the obligee.