**IV-A ("4-A") Case:** A child support case where a custodial parent and child(ren) get public assistance benefits under the state's IV-A program, which is funded under title IV-A of the Social Security Act. Applicants for IV-A assistance are automatically referred to their state IV-D agency in order to identify and locate the noncustodial parent, establish parentage and/or a child support order, and/or obtain child support payments. This lets the state get back some or all of its public assistance money from the noncustodial parent. (See also IV-D, public assistance, Temporary Assistance to Needy Families (TANF).)