The SDU is a clearinghouse for child support payments and cannot answer questions about orders or balances. For Information about a court order for support or order/notice for withholding, please contact the Clerk of the Court of the county in which the order was filed. For information about an Illinois administrative order for support or order/notice for withholding, contact the IDPA, Division of Child Support Regional Office or contact the child support hotline at (800)­447­4278.