To file for child custody, you go to the family court — sometimes called domestic relations court or superior court — in the county where your child currently lives, inside the state that qualifies as the child’s “home state” under federal jurisdiction rules. Choosing the right court is the critical first step, because filing in the wrong state can get your case dismissed or stalled for months.
Which State Has Authority Over Your Case
A court’s power to hear a custody case is called jurisdiction. For custody disputes, jurisdiction follows a federal framework called the Uniform Child Custody Jurisdiction and Enforcement Act, which 49 states have adopted, with Massachusetts the last state considering adoption as of mid-2025.1Legal Information Institute. Uniform Child Custody Jurisdiction and Enforcement Act The UCCJEA exists to make sure custody decisions happen in the state with the strongest connection to the child, and to stop a parent from relocating just to find a friendlier court.
The Home State Rule
The UCCJEA gives top priority to the child’s “home state,” meaning the state where the child has lived with a parent for at least six consecutive months immediately before the case is filed.2Office of Justice Programs. The Uniform Child-Custody Jurisdiction and Enforcement Act For an infant under six months old, the home state is wherever the child has lived since birth. Once you identify the home state, you file in the county within that state where the child currently resides.
If You Recently Moved
If you moved with your child to a new state and fewer than six months have passed, your previous state likely still has jurisdiction, especially if the other parent still lives there. The UCCJEA includes an “extended home state” provision that lets a left-behind parent start a custody case for up to six months after the child’s departure, as long as that parent remains in the original state.3Uniform Law Commission. Uniform Child Custody Jurisdiction and Enforcement Act – Section 201 This is one of the most commonly misunderstood rules. Filing in the wrong state because you assumed your new address controls is a mistake that costs real time and money.
When No State Qualifies as the Home State
Some children don’t stay in one place long enough to establish a home state. This can happen with military families who relocate often, families experiencing homelessness, or children sent between relatives in different states. When no home state exists, a court may take the case if the child and at least one parent have a “significant connection” with that state and substantial evidence about the child’s life is available there.3Uniform Law Commission. Uniform Child Custody Jurisdiction and Enforcement Act – Section 201 If even that standard can’t be met, the UCCJEA allows a court to exercise “default jurisdiction” when no other state qualifies at all.
Which Courthouse Inside That State
Once you’ve identified the correct state, you file in the county where your child currently lives. The specific courthouse goes by different names depending on where you are: family court, domestic relations court, or superior court. Your state court system’s website will list the exact courthouse that handles custody matters for each county.
If you’re already going through a divorce, custody is usually handled inside that divorce case rather than in a separate filing. You don’t open a second case.
What You File
The central document is a “Petition for Custody,” which some states call a “Complaint for Custody.” It’s a court form where you identify both parents and the child, describe the family situation, and state the custody arrangement you want. You can request legal custody (decision-making authority), physical custody (where the child lives), or both, and you can ask for sole or joint on either one.
Alongside the petition, you file a UCCJEA declaration. This form asks for the child’s addresses over the past five years and requires you to disclose any other custody or protection-order proceedings involving the child, anywhere in the country. It’s how the court confirms it actually has jurisdiction and isn’t duplicating another case.
Before you sit down with the forms, pull together:
- Full legal names and dates of birth for both parents and the child
- The child’s address history for the past five years, including dates and the names of anyone the child lived with at each address
- Information about any other court cases involving the child, including case numbers and court locations for any existing custody, divorce, domestic violence, or child protection proceedings
- A proposed parenting plan if your jurisdiction requires or encourages one at filing
Most states post the forms on their court system’s official website. Some require your signature to be notarized. After everything is completed, make at least two copies of every document: one for your records and one for the other parent.
Filing at the Clerk’s Office
Take your completed forms to the Clerk of Court’s office at the county courthouse with jurisdiction over your case. The clerk reviews your paperwork, stamps the documents with a filing date, assigns a case number, and keeps the originals. That stamp is what officially starts your case.
Filing Fees and Fee Waivers
You pay a filing fee at the clerk’s window, typically in cash, by card, or by money order. The amount varies widely by jurisdiction, from under $100 in some counties to over $400 in others. If you can’t afford the fee, you can request a waiver by filing a financial affidavit, sometimes called an “Affidavit of Indigency” or “Application for Fee Waiver.” Courts generally grant waivers to people who receive means-tested government benefits like SNAP or TANF, or whose household income falls below a threshold tied to the federal poverty level. Partial waivers on a sliding scale are available in some places.
Electronic Filing
Many court systems now offer e-filing portals where you upload your documents and pay the fee online. The legal effect is the same as filing in person. E-filing can be especially useful if you live far from the courthouse with jurisdiction, though a few courts still require in-person filing for the initial petition. Check your court’s website before making the trip.
Notifying the Other Parent
Filing isn’t finished when you leave the clerk’s office. After your petition is filed, the other parent must be formally notified through a process called “service of process.” It’s a constitutional requirement. Handing the papers to the other parent yourself does not count and can jeopardize your entire case.
Service must be performed by a neutral person who is at least 18 and has no stake in the outcome. The usual options are the county sheriff’s department (often the cheapest, sometimes slower), a private process server (typically $45 to $150 for standard service, with more scheduling flexibility), or, in some jurisdictions, certified mail with a return receipt the other parent must sign.
Whoever completes service fills out a “Proof of Service” or “Affidavit of Service” form documenting when, where, and how the papers were delivered. File that document with the court. Without it, your case can’t move forward.
Filing When a Child Is in Immediate Danger
The standard filing process takes weeks or months. When a child is in immediate danger, that timeline isn’t safe. Courts can issue emergency custody orders, sometimes called ex parte orders, without waiting for the other parent to be notified or appear. These are reserved for situations involving abandonment, abuse, or threats of serious harm to the child or a parent.2Office of Justice Programs. The Uniform Child-Custody Jurisdiction and Enforcement Act
To get one, you file a motion with supporting evidence explaining why the situation qualifies as an emergency. A judge reviews the request, sometimes the same day, and can grant temporary custody on the spot. The order is temporary. It keeps the child safe until a full hearing can be scheduled, usually within a few weeks, at which point the other parent gets to appear and respond.
The UCCJEA also allows a court to exercise temporary emergency jurisdiction even when it wouldn’t normally have authority. If a child is physically present in a state and has been abandoned or is being abused, that state’s court can step in to protect the child regardless of where the home state is. Once the emergency passes, the case typically transfers to the home state court for a permanent decision.
If You Were Never Married to the Other Parent
You can still file for custody if you were never married, but there’s an extra step for fathers. A father whose name isn’t on the birth certificate and who hasn’t signed a voluntary acknowledgment of paternity will generally need to establish legal fatherhood before a court will grant custody or visitation. Some states let you combine a paternity action and a custody petition into one case, which saves time.
If Either Parent Is in the Military
Where you file doesn’t change for military families, but federal protections do affect how the case proceeds. The Servicemembers Civil Relief Act prevents a court from entering a default judgment against a parent in military service without first requiring the filing parent to submit an affidavit about the servicemember’s status, and if the parent is serving, the court must appoint an attorney to represent them.4Office of the Law Revision Counsel. United States Code Title 50 Section 3931 – Protection of Servicemembers Against Default Judgments The court must also grant at least a 90-day stay of proceedings if military duties prevent the servicemember from appearing.
A separate provision bars courts from using deployment as the sole basis for changing an existing custody arrangement. Any temporary custody order entered because of deployment must expire when the deployment ends, and a court cannot treat a parent’s military absence as the only factor when deciding what’s in the child’s best interest.5Office of the Law Revision Counsel. United States Code Title 50 Section 3938 – Child Custody Protection Many states add protections on top of these federal minimums. If either parent is in the military, knowing these rights before filing or responding can prevent an outcome that wouldn’t survive scrutiny once the deployed parent returns.