Yes. The Income Withholding for Support is a federally required form and is used in all support cases in all states. The signature of a judicial officer is not required when the order is sent by a Local Child Support Agency (LCSA), which is a county or regional child support office. If the order is not from an LCSA, you should still consider it valid and send a copy to the California State Disbursement Unit (SDU). The SDU will send you a notification with a Child Support Enforcement case number.
Note: An IWO is commonly issued whenever a child support case is established and the parent with higher earnings or less custody is employed. It is rare for a parent who is employed to be allowed to pay through other means. Employers shall not use an Income Withholding for Support as grounds for refusing to hire a person or for taking disciplinary action against an employee. Employers could face civil penalties if they do so.