Child Custody Jurisdiction: Home State, Forum, and Enforcement

Child custody jurisdiction is decided under the Uniform Child Custody Jurisdiction and Enforcement Act (UCCJEA), which every state has adopted. The core rule: the child’s home state — where the child lived with a parent for at least six consecutive months right before the case was filed — is the state whose court has authority to make binding custody decisions.¹ Everything else in the UCCJEA is either a refinement of that rule or a backup for cases where no state clearly qualifies.

How the Home State Rule Works

A state is the home state if the child lived there with a parent, or a person acting as a parent, for the six consecutive months immediately before the custody case is filed.¹ For a baby younger than six months, the home state is wherever the child has lived since birth.

Short trips don’t reset the clock. A vacation, a visit to grandparents, or a stay at a summer program counts as a temporary absence, and the six months keep running through it.¹ One parent can’t defeat jurisdiction by taking the child out of state for a while.

There’s a second version of the rule that catches most people off guard. Even after a child has physically moved away, the original state remains the home state if it was the home state within the six months before filing and at least one parent still lives there.¹ So if one parent leaves with the child and the other files back home within six months, the case belongs to the original state regardless of where the child is now sleeping.

When No State Qualifies as the Home State

If no state meets the home state test, or if the home state court steps aside, a court can take the case when the child and at least one parent have significant connections to that state and substantial evidence about the child’s care, protection, training, and personal relationships is available there.² This is a backup, not an alternative. Judges look at things like school records, medical history, therapist notes, and nearby relatives who could testify. A child who went to school in the state for three years, saw a pediatrician there, and has grandparents in the next county has a significant connection. A child who spent one summer there does not.

Emergency Jurisdiction

A court in a state that would not otherwise qualify can still issue a temporary order if the child is physically present there and has been abandoned, or if the child, a sibling, or a parent needs immediate protection from abuse or a credible threat of abuse.²

Emergency orders are meant to be short. When another state already has jurisdiction or a case is pending elsewhere, the emergency order has to specify how long it lasts — just enough time for the endangered party to seek protection from the proper court. The two courts then communicate directly to coordinate.² An emergency order only becomes a lasting custody determination when no other state has jurisdiction, no case has been started elsewhere, and the emergency state eventually becomes the child’s home state.¹

Which Court Keeps Control After an Order Exists

Once a court properly issues an initial custody order, that same court keeps exclusive authority to modify it. No other state can change the order as long as the child, a parent, or a person acting as a parent still lives in the original state and maintains a significant connection there.¹

The original court loses this hold in only two ways. It can decide for itself that neither the child nor a parent retains a significant connection to the state and that relevant evidence is no longer available there. Or a court can find that the child, both parents, and anyone acting as a parent have all moved away.¹

Modifying an Order After a Move

If you’ve moved and want to change an existing custody order, you can’t just file where you now live. The new state has to independently qualify for initial jurisdiction under the home state or significant connection rules, and the original state has to either give up its continuing jurisdiction or decide the new state is a more convenient forum. The other path is when everyone connected to the case — the child, both parents, and anyone acting as a parent — has left the original state.¹ A parent who stays behind can anchor jurisdiction in the original state for years after the child has built a full life somewhere else.

When a Court That Qualifies Still Refuses the Case

Having jurisdiction and using it are two different things. The UCCJEA gives courts two grounds to decline authority even when they technically qualify.

Inconvenient Forum

A court can decide another state is better positioned to handle the case. Before stepping aside, it weighs whether domestic violence has occurred and which state can best protect the parties, how long the child has lived outside the state, where the key evidence sits, the parties’ financial circumstances, and which court is most familiar with the facts.² The parties’ own agreement about the forum matters but isn’t decisive. If the court declines on this basis, it can order the party who filed to pay the other side’s travel costs and attorney’s fees.

Unjustifiable Conduct

A court must decline jurisdiction when the person seeking custody manufactured that jurisdiction through wrongful behavior — taking a child from another state without permission, hiding a child, or keeping a child beyond an agreed visitation period. On top of losing the case, the wrongdoing party can be ordered to pay the other side’s costs, attorney’s fees, travel expenses, investigative fees, witness expenses, and childcare costs.² Taking a child and filing in the new state to get a fresh start is a losing strategy.

The Jurisdiction Affidavit

Every party in a custody case has to file a sworn affidavit (sometimes called a declaration) with their first court filing. The UCCJEA requires it to contain:

The child’s current address.
Every place the child has lived for the past five years, and the names and addresses of every person the child lived with during that period.
Any other custody case involving this child, in any state, in any capacity — including the court, case number, and outcome.
Any pending related proceedings, such as domestic violence protective orders, termination of parental rights, or adoption cases.
The name and address of any person not a party who has physical custody of the child or claims custody or visitation.

This document is how the judge verifies the six-month home state requirement and spots competing cases in other states. It’s signed under penalty of perjury, and lying about residency or hiding another proceeding is a federal crime punishable by up to five years.³ The whole jurisdictional framework runs on accurate residency information; a false address can lead to the wrong court making a custody decision that later collapses.

Two Courts, One Child

When courts in two states both receive filings about the same child, the judges are required to talk to each other on the record and decide which state should proceed. Both parties have to be notified and given access to the record of the conversation.² If the judges can’t agree, the court where the case was filed first generally proceeds and the second court dismisses.

The federal Parental Kidnapping Prevention Act sits behind all of this. It requires every state to enforce custody orders made consistently with the UCCJEA’s jurisdictional standards, forbids a state from exercising jurisdiction while another state is properly handling a case, and prohibits modification of a valid out-of-state order unless the original state has lost jurisdiction or declined it.⁴ Where the UCCJEA depends on state courts cooperating, the PKPA makes enforcement a federal obligation.

Enforcing a Custody Order in Another State

If you already have a custody order from one state and need it enforced in another, the UCCJEA sets up a registration process. You send the order and a request for registration to a court in the state where you need enforcement. That court files it as a foreign judgment and notifies the other parent.²

The other parent has 20 days to contest, and there are only three grounds:

The court that issued the original order lacked proper jurisdiction under the UCCJEA.
The person challenging registration never received proper notice of the original proceeding.
The order has been vacated, stayed, or modified by another court.

If no hearing is requested within those 20 days, registration is automatically confirmed and the order is enforceable in the new state as if a local court had issued it.² Local enforcement tools — contempt, make-up visitation, modified scheduling — all become available.

Foreign and Tribal Cases

The UCCJEA treats a foreign country as though it were a U.S. state for jurisdiction purposes, and a custody order from another country is generally enforceable in the United States if the foreign court applied jurisdictional standards substantially similar to the UCCJEA’s.² U.S. courts don’t have to recognize a foreign order if the other country’s custody laws violate fundamental principles of human rights, but that exception is reserved for extreme situations.

Cases involving Native American children may fall under the Indian Child Welfare Act instead of the UCCJEA. When ICWA applies, it takes priority. For disputes between state and tribal courts outside ICWA, the UCCJEA applies only in states that have adopted optional provisions treating tribes as states and tribal custody orders as sister-state orders.² Not every state has, so how a tribal-state dispute is handled depends on where you live.

1
National Conference of Commissioners on Uniform State Laws. Uniform Child Custody Jurisdiction and Enforcement Act (1997)
2
Office of Juvenile Justice and Delinquency Prevention. The Uniform Child-Custody Jurisdiction and Enforcement Act
3
Office of the Law Revision Counsel. 18 USC Chapter 79 – Perjury
4
Office of the Law Revision Counsel. 28 USC 1738A – Full Faith and Credit Given to Child Custody Determinations