This form is used to notify an employer to withhold wages from a noncustodial parent when they have past-due child support. View the form in English.Why do I still have to pay child support? 1. How do you get child support payments from my employer? Wage withholding lets you make your child support payments through your regular paycheck. Federal law requires that states offer and provide child support services (IV-D services) to all families, not just those who receive public assistance. The IWO is the OMBapproved form (PDF) used for income withholding in tribal, intrastate, and interstate cases as well as all child support orders. The IWO is the income withholding order. This is an order sent to your husband's employer after your divorce is finalized and the child support is calculated. The other parent can also get a wage garnishment order from the court if you get behind in child support payments.