How to Find a Parent Who Owes Child Support From a Court Case Number
You have a number. It is on the order, on the letter that stopped coming, on the portal login you cannot get past. And somewhere behind it is a person who has moved, and a payment that has not arrived in a long time. Here is the thing the number actually tells you, and almost nobody says it plainly: a case exists. Not a file in a drawer — a case, with a public agency attached to it, an obligation on that agency to go and look, and a deadline on that obligation written into federal regulation. The useful question on this page is therefore not “how do I find him.” It is: what is already supposed to be happening, what does it owe me, by when, and what do I do when the answer is that it has quietly stopped.
The Short Version
Three facts change what you do next, and none of them is on the first page of search results. First, the agency is on a clock. 45 CFR § 303.3(b)(3) is not advisory: the programme must, “within no more than 75 calendar days of determining that location is necessary, access all appropriate location sources and ensure that location information is sufficient to take the next appropriate action in a case.” If your case has been silent for a year, that is a fact you are entitled to raise, in those words. Second, the statute names you. 42 U.S.C. § 653(c) defines who may be given Federal Parent Locator Service information, and paragraph (3) is “the resident parent, legal guardian, attorney, or agent of a child” — for a child not receiving assistance under a State programme funded under part A — and it says so “without regard to the existence of a court order…”. You are not a bystander to this machinery; you are a category inside it. Third, and this matters more than anything else here: the locate service has a safety shutoff built into it. 42 U.S.C. § 653(b)(2) provides that no information shall be disclosed if the State has notified the Secretary that it has reasonable evidence of domestic violence or child abuse and disclosure could be harmful to the custodial parent or the child. That is federal law, not a company policy, and it works in both directions — which is the first thing to understand if you are reading this because you are afraid of the person on the other side of the case.
Watch: What a Child Support Case Number Actually Unlocks
Two Numbers, Two Registries
They look alike, they are written on the same letter, and they open different doors.
Before anything else, work out which number you are holding, because people use “case number” for two different objects and the two live in different buildings. The IV-D case number is the administrative file the state child support programme opened for you. It is the login credential on every state portal, it is what a caseworker types, and it is the number that connects you to the enforcement machinery — income withholding, tax refund offset, licence action, credit reporting, the federal locate service. The court docket number is the file of the proceeding in which an order was entered. It is the number a clerk types. It opens a record you can usually read yourself.
Most people with an established order have both, and the two are frequently printed side by side on the same page without labels. If yours came from a portal login screen or a payment statement, it is almost certainly the IV-D number. If it came from the face of an order, a judgment, or anything with a caption naming a petitioner and a respondent, it is the docket number. If you genuinely cannot tell, the clerk of the court that issued your order will tell you in one telephone call, and that call is free.
The distinction is not pedantry. It decides where you go with the thing you want. A caseworker cannot look up a docket number in their system and a clerk cannot look up a IV-D number in theirs, and each will tell you, correctly, that your number does not exist — which is how a person concludes their case has vanished when it has not.
If you have no number at all
Then you do not have an open case, and the first move is not a search. It is an application. 45 CFR § 302.33 requires the state programme to make its services available to individuals who apply, whether or not there is public assistance in the picture, and the application is what starts every clock described on this page. Locating somebody privately before there is a case to enforce is usually spending money to arrive somewhere the state would have taken you for nothing. If you are at that stage, how child support enforcement actually locates a parent is the better starting point.
What the Number Opens, and What It Will Not
Ordered by how much of the work it actually does for you.
| What you want | What the case number gets you | The honest limit |
|---|---|---|
| A current address | The docket file’s address of record and return of service, readable by you in most states; and the agency’s own locate obligation, which is timed. | Every address in a file is dated. It is where somebody was, not where they are, and a file that has been quiet for years will give you a cold one. |
| An employer to withhold from | The income withholding order in the file names one, with an address, as at its date. The agency’s duty under 303.3(a) expressly extends to employers and other sources of income. | A former employer holds none of the obligor’s money. It is evidence of identity and a lead, not a garnishee. |
| To know whether anything is happening | Fully served, and this is the strongest use. The 75-calendar-day standard in 303.3(b)(3) turns a vague complaint into a dated question a supervisor can check. | The clock runs from the determination that location is necessary. If no such determination was recorded, no clock started — which is the answer you are looking for. |
| Federal Parent Locator Service data | You are an authorized person under 653(c)(3), without regard to whether an order exists. | Requests run in the manner the Secretary prescribes, through the State service. There is no public access and we cannot obtain it for you either. |
| To know which state can act | The caption tells you which tribunal entered the order, which is where the continuing exclusive jurisdiction question starts. | It does not answer it. UIFSA is enacted state by state and the answer belongs to your caseworker or attorney, not to a web page. |
| To find somebody who is hiding from you | Nothing, and deliberately so. | Where a State has recorded evidence of domestic violence or child abuse, 653(b)(2) shuts the federal service off. We decline these too. |
Read down the middle column and the pattern is plain: the case number is not a lookup key. It is a claim on a process. Nearly everything it gets you, it gets you by proving that a duty is owed to you and identifying who owes it.
That is also why the strongest single move on this page costs nothing. Before buying any search, ask for the date on which a determination was made that location was necessary. The answer is either a date — in which case you know exactly where you stand against the 75-day standard — or it is silence, which is itself the finding.
What “Location” Legally Means, and the 75-Day Clock
The regulation is more generous than the word sounds, and it is timed.
The word “locate” makes people think of an address, and an address is the smallest part of it. 45 CFR § 303.3(a) defines location for these purposes as “obtaining information concerning the physical whereabouts of the noncustodial parent, or the noncustodial parent’s employer(s), other sources of income or assets, as appropriate, which is sufficient and necessary to take the next appropriate action in a IV-D case.” Read that again with the emphasis where it belongs: employers, other sources of income, assets. The obligation is not discharged by producing a street address that leads nowhere. It is measured against whether what came back is sufficient to take the next appropriate action — and if the next appropriate action is a withholding order, an address without an employer has not met the standard.
Then the timing. The same regulation requires the programme, “within no more than 75 calendar days of determining that location is necessary, access all appropriate location sources and ensure that location information is sufficient to take the next appropriate action in a case.” Seventy-five calendar days, from the determination that location is needed — not from your telephone call, and not from the day a caseworker got round to the file. The regulation also directs the programme to use appropriate location sources and sets them out by name in a list that runs well past the obvious ones; that enumeration is worked through in detail on finding somebody’s current employer and is not repeated here.
What do you do with a deadline? You use it as a question, not as a threat. “Has a determination been made that location is necessary on this case, and if so, on what date?” is a question a caseworker can answer and a supervisor can check. It converts “nothing is happening” — which invites a sympathetic non-answer — into a dated, checkable fact. Most stalled cases we see are not refusals. They are files where no such determination was ever recorded, so no clock ever started.
Where These Cases Actually Go Wrong
Four failures we see repeatedly, none of them the reader’s fault.
The number was typed into the wrong system
A docket number handed to a caseworker, or a IV-D number handed to a clerk, returns “no such case.” People hear that as their case having been closed or lost, and stop. It is a registry mismatch and it is fixed by one telephone call to the other office.
No determination that location was necessary was ever recorded
The 75-day standard runs from that determination. If nobody made it, nothing is late, nothing is flagged, and the file simply sits — indefinitely, and without anybody doing anything wrong on paper. This is the single most common reason a case goes quiet.
A withholding order was sent to a job that had ended
It comes back empty and the file records an unsuccessful enforcement attempt, which reads like the obligor is unreachable. The old employer was never a garnishee; it was identity evidence, and it should have gone to the caseworker as a locate source instead.
The wrong same-named person is pursued
Common names plus an old address produce a confident, wrong match. An enforcement step taken against the wrong person is expensive to unwind and can damage somebody who has nothing to do with the case. This is the failure worth paying to avoid.
The Statute Names You
And then, in the next subsection, tells you the limit on it.
The Federal Parent Locator Service is described everywhere as something that happens to your case. The statute is less remote than that. 42 U.S.C. § 653(c) defines “authorized person” for these purposes as a short, closed list: agents and attorneys of a State or tribe with an approved plan who have the duty or authority to recover support; the court with authority to issue an order or to serve as the initiating court, or its agent; the resident parent, legal guardian, attorney, or agent of a child other than a child receiving assistance under a State programme funded under part A, and expressly “without regard to the existence of a court order…”; a State agency administering certain child-welfare and foster-care programmes; and a designated Central Authority in a foreign reciprocating or treaty country.
Paragraph (3) is the one worth knowing. It means the category you belong to is written into the federal statute, and that your standing does not depend on having got an order first. That is a genuinely useful thing to know when somebody tells you the system cannot help until you have been to court.
Now the limit, stated here because a page that gave you the first half and not the second would be doing you harm. Being an authorized person is not a right to telephone the locate service. 42 U.S.C. § 653(d) provides that a request “shall be filed in such manner and form as the Secretary shall by regulation prescribe” and be supported by whatever documents are required. In practice the route runs through the State Parent Locator Service and your own caseworker; there is no public counter and no telephone number for the public. So the value of paragraph (3) is not that it lets you make the search yourself. It is that it tells you the request being made on your behalf is one the statute contemplates you being behind, which is a different conversation from asking a favour. the federal programme’s own overview of the Federal Parent Locator Service sets out how the service is structured.
Read the File. It Already Holds Addresses.
The one thing on this page you can do this afternoon, without anybody’s permission.
Every page that ranks for this question treats a case number as a portal credential. A docket number is also a pointer to a file, and in most states that file is a public record you may go and read. What is in it is frequently better than what people pay for.
The address of record is the address a party gave the court and is obliged to keep current; a change is often filed even by somebody avoiding everything else, because failing to file one has consequences inside the case. The return of service, or the affidavit of the person who served the papers, records an address where a human being was physically found on a stated date, and sometimes a physical description and the time of day. The income withholding order, if one issued, names an employer and an address for that employer — a dated, documentary employment fact. The most recent filing of any kind, even an unrelated motion, carries a signature block and a date, and the date is worth as much as the address: it tells you when the trail was last warm.
Two cautions. First, family and juvenile records are more restricted than ordinary civil records, and several states seal or partly seal support files; a clerk will tell you which category yours is in, and if the answer is that you may not see it, that is the answer. Second, an address in a file is a record of where somebody was on the date of the document, and nothing more. Treat every line as dated evidence rather than as a current fact, and you will not chase a house the person left in 2019. If the file turns out to be one you cannot pull yourself, locating somebody so papers can actually be served covers the adjacent problem.
Which Tribunal Actually Controls
On an interstate case this decides everything, and no ranking page mentions it.
If the order was entered in one state and somebody now lives in another, there is a prior question to all of this: which state may act. The framework is the Uniform Interstate Family Support Act, which every state has enacted, and its governing idea is continuing exclusive jurisdiction — broadly, that the tribunal that issued a support order keeps the power to modify it while a statutory connection to the case remains, so that two states cannot hold competing orders over the same obligation. Enforcement and modification are treated differently: another state can commonly enforce an order it could not modify.
We are naming that framework rather than citing a section, and the reason is worth saying out loud. UIFSA is a uniform act adopted state by state; there is no single national section number to quote, and its provisions sit at different citations in different codes. Anyone who quotes you a bare UIFSA section as though it were federal law is telling you something that is not quite true. Ask your caseworker or your attorney which state has continuing exclusive jurisdiction over your order, and get the answer before you spend anything on a locate. If the answer is a state other than the one you assumed, the case number you are holding may be a registration of somebody else’s order rather than the order itself, and the file you want is in a different courthouse.
Where We Actually Add Something — and Where We Do Not
A short list, honestly drawn, and the requests we turn down.
The reason this page keeps sending you back to the agency is not modesty. It is that the agency reaches records no private party can buy at any price: federal and state data matches, the new-hire directory, and the locate service described above. Where a case is genuinely being worked, a private locate mostly duplicates it more slowly. So the honest band is narrow and we would rather name it than sell past it.
It is worth buying when the file has been silent past that 75-day mark and you want an independent, dated picture of address and employment history to put in front of a supervisor; when the programme reports the obligor as not located and you have reason to think they are working in a way the directory does not capture; when there are competing candidates with the same name and the case needs the right person identified before an enforcement step is taken against the wrong one; or when you need documented, source-stamped address history for a lawyer to use in a filing. Related work is set out on skip tracing for child support enforcement and collecting arrears.
And the refusals, which are as fixed as the work. We do not contact the other parent, and we do not tell anybody why we were asking. We are not a consumer reporting agency and what we produce is not a consumer report; it is not for employment, tenancy, credit or insurance decisions. We do not collect money, serve process or appear anywhere. We work United States subjects only. And we decline any request where the apparent purpose is reaching somebody who left for their own safety — the same line federal law draws at 42 U.S.C. § 653(b)(2), where the locate service itself is shut off on evidence of domestic violence or child abuse. If that is your situation, tell your caseworker and the court that issued your order, in those words, because the protection has to be recorded with the State before the shutoff can operate. General information here, not legal advice.
How to Work It, in Order
Free steps first. Every one of them narrows what a paid search would need to do.
Identify which number you hold
IV-D administrative number or court docket number. If the document has a caption with a petitioner and a respondent, it is the docket. One call to the clerk settles it, and it costs nothing.
Ask the dated question
Ask your caseworker whether a determination has been made that location is necessary, and on what date. Write the answer down. That single date is what the 75-calendar-day standard in 45 CFR 303.3(b)(3) attaches to.
Pull the court file
Address of record, return of service, any income withholding order, and the most recent filing of any kind. Note the date against every address. If the file is restricted, the clerk will tell you, and that is the end of that route.
Settle which state controls
On an interstate case, establish which tribunal has continuing exclusive jurisdiction before spending anything. A locate pointed at the wrong forum buys you nothing you can use.
Then, if it is still stuck, send us the residue
The full legal name, the case and order numbers, the issuing state, every address and date you now hold from the file, and what the programme has already tried — so we work what is left rather than repeat it. Documented findings typically within 24 hours.
Who Brings Us This Search
Four readers, one number, quite different questions.
A Custodial Parent With a Silent File
Payments stopped, calls go to voicemail, and the portal shows nothing new. The question is not really where he is; it is whether anyone is still looking, and the dated question above is how to find out.
Family Law Counsel
You need documented, source-stamped address and employment history to attach to a motion, in a form that will survive an objection, and you need it to identify one person rather than a plausible one.
A Parent With an Out-of-State Order
The order is from one state, the obligor is in another, and nobody has told you which tribunal may modify it. The locate is the second question; the forum is the first.
A Parent Who Is Afraid
Sometimes the person reading this is the one being looked for, or is frightened of the person on the other side. 42 U.S.C. 653(b)(2) exists for you. Tell the State and the issuing court so the protection is on the record.
Our Commitment
We do public-records research under a permissible purpose, and we say what we cannot do as plainly as what we can. On this errand that means routing you to your own child support programme first, because it reaches federal and state data no private party can obtain, and telling you the narrow band where an independent locate genuinely adds something. We do not contact the other parent, collect money, serve process or appear. We are not a consumer reporting agency and our findings are not consumer reports. We work United States subjects only. Every line we hand you carries the date it was last true and the source it came from, and the gaps are written down as gaps.
Frequently Asked Questions
Can I look up the other parent’s address using the case number myself?
Not through the child support system. A case number authenticates you to your own case — payments, balances, status — and portals are built to show you your file, not the other party’s current address. What you can often do yourself is read the court file behind the docket number, which in most states is a public record and which routinely contains an address of record and a return of service. Those are dated records of where somebody was, not a current address, and family files are more restricted than ordinary civil ones in several states.
How long is the agency allowed to take?
45 CFR § 303.3(b)(3) requires the programme, “within no more than 75 calendar days of determining that location is necessary, access all appropriate location sources and ensure that location information is sufficient to take the next appropriate action in a case.” The clock runs from that determination, not from your call, which is why the question to ask is whether a determination has been made and on what date. If none was recorded, nothing is formally overdue — and that, rather than a delay, is usually what is wrong with a quiet file.
Am I allowed to get Federal Parent Locator Service information?
You are within the statutory category. 42 U.S.C. § 653(c)(3) names “the resident parent, legal guardian, attorney, or agent of a child” — for a child not receiving assistance under a State programme funded under part A — as an authorized person, and adds “without regard to the existence of a court order…”. But § 653(d) requires requests to be filed in the manner and form the Secretary prescribes, which in practice means through the State service and your caseworker. There is no public access point, and no private firm can obtain it for you either.
What is the difference between the IV-D case number and the docket number?
The IV-D number is the state child support programme’s administrative file — the portal login, the enforcement machinery. The docket number is the court proceeding in which an order was entered, and it opens a record you can usually read. They are different registries: a caseworker cannot find a docket number in their system and a clerk cannot find a IV-D number in theirs, and each will correctly tell you the number does not exist. That exchange is why many people believe their case has disappeared.
The other parent moved to another state. Does my order still work?
Generally yes for enforcement, and the harder question is modification. Every state has enacted the Uniform Interstate Family Support Act, whose central idea is continuing exclusive jurisdiction: the tribunal that issued the order keeps the power to modify it while a statutory connection remains, so two states cannot hold competing orders. Another state can often enforce an order it could not modify. We deliberately do not quote a section number for this, because UIFSA is enacted state by state and sits at different citations in different codes — ask your caseworker or attorney which state has it over your order.
Is it worth hiring anyone if the agency is already looking?
Usually not, while it is genuinely looking. The programme reaches federal and state data matches and the new-hire directory, free, and no private party can buy equivalent access. The band where an independent search earns its cost is narrow: a file silent past the 75-day standard where you want a dated, independent picture to put in front of a supervisor; a not-located finding you have reason to doubt; competing same-name candidates that need resolving before an enforcement step hits the wrong person; or documented address history a lawyer needs for a filing.
I am frightened of the other parent. What should I do?
Tell the State child support programme and the court that issued your order, in plain words, and do it before anything else. This is not only good practice: 42 U.S.C. § 653(b)(2) provides that no information shall be disclosed where the State has notified the Secretary that it has reasonable evidence of domestic violence or child abuse and disclosure could be harmful to the custodial parent or the child. The protection operates once the State has that on the record, so recording it is the step that makes it real. If you are the person somebody is trying to locate, the court that issued any protective order can reach records and impose consequences no private party can. We decline searches whose apparent purpose is reaching somebody who left for their own safety, and no arrears figure changes that.
What do you need from me, and what comes back?
The other parent’s full legal name in every form you have seen it, the case and order numbers with the state that issued them, every address and date you have taken out of the court file, any employer named in a withholding order with the date of that order, and a note of what the programme has already tried. Back comes one identified person, address history and employer of record where the records carry one, each line stamped with the date it was last true and the source it came from, and the gaps written down as gaps rather than smoothed over. We work United States subjects only, and findings typically come back within 24 hours.
A Case Number and a File That Has Gone Quiet?
Ask your programme the dated question first — it costs nothing and it is often the whole answer. If the file is still stuck after that, send us the name, the numbers and what the file already told you. Documented findings typically within 24 hours. Contact us to get started.
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