What Is a Full Service Child Support Case?

A full service child support case is one handled start to finish by your state’s child support enforcement agency: the government locates the other parent, establishes paternity if needed, sets up the support order, collects the payments, and enforces the order when payments stop. These cases are known in the system as IV-D cases, after Title IV-D of the Social Security Act, which requires every state to run a child support program.¹ For most families, it’s the cheapest and most powerful way to get support established and paid.

What the Agency Actually Does for You

In a private child support arrangement, a court order may exist, but no one is watching it. If payments stop, you have to go back to court or hire an attorney. A full service case works differently. Federal law requires every state agency to locate noncustodial parents, establish paternity, set support orders, enforce those orders, modify them when circumstances change, and collect and distribute payments.¹

The locate function alone is worth a lot. If you don’t know where the other parent lives or works, the agency can tap the Federal Parent Locator Service, which cross-references Social Security records, IRS data, state employment databases, and other federal records to find an address, employer, or assets.² A private attorney has no access to these systems.

When the parents weren’t married, paternity has to be legally established before any support order can issue. The agency handles this either through a voluntary acknowledgment signed by both parents (often at the hospital, and binding unless contested within 60 days) or, when there’s a dispute, through genetic testing arranged with a qualified lab.³⁴ Establishing paternity also opens up the child’s rights to the father’s health and life insurance benefits, Social Security, veterans’ benefits where applicable, and inheritance.

Once paternity is settled, the agency uses the state’s numerical guidelines to calculate the support amount. The formula varies by state, but the inputs are similar: both parents’ incomes, number of children, childcare costs, and health insurance. Federal law requires those guidelines to be reviewed at least every four years.⁵ Every order must also include a provision for medical support, which can mean adding the child to employer-sponsored insurance, splitting uninsured medical costs, or enrolling the child in Medicaid or CHIP.⁶ Many parents are surprised by this piece: the order won’t just set a dollar amount, it will spell out who carries coverage.

Who Qualifies

Almost anyone raising a child can open a case. Custodial parents, grandparents, foster parents, and other caregivers are all eligible. Noncustodial parents can also request services, especially to establish paternity or ask for a modification.

Families receiving Temporary Assistance for Needy Families (TANF), foster care benefits, or Medicaid don’t need to apply separately. Federal law requires the state to automatically provide child support services for children in those programs.¹ There’s a trade-off for TANF recipients: cooperation with child support enforcement is mandatory, and families that refuse without good cause face at least a 25 percent reduction in their cash assistance.⁷ You also assign your right to collected support to the state while on benefits, so some or all of what’s collected reimburses the government rather than going to you.⁸ Once you leave TANF, full payments flow directly to you.

Cost is modest. Federal law caps the one-time application fee at $25 for families not getting public assistance, and states can charge less or waive it. A separate $35 annual fee applies once the agency has collected at least $550 on your behalf, but only if you’ve never received TANF, and it comes out of collected support rather than being billed to you.¹

How to Open a Case

If you’re not already enrolled through a public assistance program, apply through your state’s child support agency. Most states accept applications online, by mail, or in person. Bring as much of this as you can:

The other parent’s name, address, and Social Security number
Birth certificates for the children
Any existing court orders, divorce decrees, or separation agreements
Employment and income information for both parents

You don’t need every piece of documentation to start. The agency’s guidance is simply to bring as much as possible, because more information speeds up processing.⁹ Missing the other parent’s Social Security number or current address is exactly what the Federal Parent Locator Service is for.

Processing times vary. If the other parent is easy to find and paternity isn’t disputed, you may have an order within a few months. A parent search or contested paternity test takes longer. Once payments start, the agency distributes them electronically by direct deposit or a stored-value card.¹⁰

The Enforcement Tools You Get

Enforcement is where a full service case pays off. Federal law requires every state to maintain a set of procedures that no private attorney can match.¹¹

Automatic income withholding is the default. Support is deducted from the paying parent’s paycheck before they see it, starting when the order takes effect rather than after a missed payment. “Income” covers wages, commissions, bonuses, disability, retirement benefits, and interest.¹²
State and federal tax refunds can be intercepted and redirected to cover overdue support.
Liens attach automatically to the delinquent parent’s real estate and personal property, and states must honor liens issued by other states.
Driver’s licenses, professional licenses, and recreational licenses like hunting and fishing permits can be suspended.
When past-due support reaches $2,500, the case is referred to the U.S. State Department, which must deny any passport application and can revoke or restrict an existing one.¹³
Delinquent parents are reported to consumer credit bureaus. The current statute sets no minimum dollar threshold, so any delinquency can show up.¹¹

These tools stack. A parent who ignores wage withholding may lose a tax refund, then a driver’s license, then a passport. That cascading pressure is the whole point of the system, and a custodial parent could never replicate it alone.

Changing the Order Later

Support orders aren’t permanent. In TANF cases, the agency automatically reviews the order at least once every three years. In non-TANF cases, either parent can request a review at least every three years, and the agency has to send a notice reminding both parents of this right.¹⁴

You don’t have to wait three years. Either parent can request a review at any time based on a substantial change in circumstances: job loss, a major shift in income, disability, or incarceration lasting more than 180 days.¹⁵ The agency runs current income through the state’s guidelines and decides whether the new figure differs enough to justify a change. Many states require a certain dollar or percentage difference before they’ll adjust. Once a review is requested, the agency has 180 days to complete it.¹⁴

A critical warning: if your income drops and you simply stop paying the old amount instead of asking for a modification, the unpaid balance builds up as arrears at the original rate. Arrears don’t go away. Request the modification first.

When the Parents Live in Different States

Every state has adopted the Uniform Interstate Family Support Act, which runs on one rule: one state, one order. A single support order issued by one state must be recognized by every other state and cannot be modified by another state as long as the original state keeps jurisdiction (meaning the child or at least one parent still lives there).

Your local agency can register an existing order in the other parent’s state and use that state’s enforcement tools, including sending an income withholding notice directly to the employer. You don’t need to hire an attorney in the other state. Interstate cases move slower than same-state ones, but the enforcement toolkit is the same.

What These Cases Do Not Cover

Child support agencies handle money. They do not handle custody or visitation. If the other parent is denying your parenting time, the agency cannot help, and if your parenting time is being denied, you still owe support. The two issues are legally separate, and refusing to pay because you’re being kept from the child only piles up arrears against you. Custody and visitation disputes go through family court, with a private attorney or legal aid if you qualify.

When the Obligation Ends

Support obligations don’t run forever, but the end date depends on your state. In most states, support ends when the child turns 18, though many states extend it to 19 or 21 if the child is still in high school or, in some cases, attending college. A few states allow support to continue to age 23 in specific situations such as disability. The order itself usually spells out the termination date; if it doesn’t, your caseworker can confirm it.

Any unpaid arrears remain collectible after the obligation ends. Wage withholding, tax interception, license suspension, and credit reporting all keep running until the balance is paid in full. Aging out of child support doesn’t erase the debt.

1
Office of the Law Revision Counsel. 42 USC 654 – State Plan for Child and Spousal Support
2
Administration for Children and Families. Overview of Federal Parent Locator Service
3
Office of Child Support Enforcement. Child Support Handbook Chapter 3 – Establishing Fatherhood
4
eCFR. 45 CFR 303.5 – Establishment of Paternity
5
Office of the Law Revision Counsel. 42 USC 667 – State Guidelines for Child Support Awards
6
Administration for Children and Families. Health Care
7
GovInfo. Client Sanctions under Temporary Assistance for Needy Families
8
GovInfo. Distributing Collected Child Support to Families Exiting TANF
9
Administration for Children and Families. What Documents Do I Need to Bring to the Child Support Office?
10
Administration for Children and Families. Electronic Disbursement of Child Support Payments
11
Office of the Law Revision Counsel. 42 USC 666 – Requirement of Statutorily Prescribed Procedures to Improve Effectiveness of Child Support Enforcement
12
eCFR. 45 CFR 303.100 – Procedures for Income Withholding
13
Administration for Children and Families. Passport Denial Program 101
14
eCFR. 45 CFR 303.8 – Review and Adjustment of Child Support Orders
15
Administration for Children and Families. Changing a Child Support Order