When two parents live in different states, the first question a court asks is not who should have the child. It is whether this court has authority to decide anything at all. The Uniform Child Custody Jurisdiction and Enforcement Act — the UCCJEA — supplies the answer, and it has been adopted in nearly every state, which makes the rules unusually consistent for a family-law topic.
The core rule is short: the child's home state comes first. Home state means the state where the child lived with a parent or person acting as a parent for at least six consecutive months immediately before the case was filed (for a child under six months old, the state where the child has lived since birth). Everything else in the statute — emergency powers, the original state's continuing authority, registration of out-of-state orders — is built around that priority.
The four doors into custody jurisdiction
State versions of the UCCJEA give a court authority to make an initial custody determination through a ranked list. They are not alternatives you get to choose among; you work down the list in order.
- Home state. The child lived there with a parent for six consecutive months before filing — or lived there within the past six months and a parent still lives there, even if the child has since left. Temporary absences (a summer trip, a hospital stay) usually count toward the six months rather than breaking them.
- Significant connection. If no state qualifies as the home state, or the home state declines, a court may act where the child and at least one parent have a significant connection beyond mere presence, and where substantial evidence about the child's care, protection, training, and personal relationships exists.
- More appropriate forum. A court that could otherwise act may decline because another state is a better place to litigate, handing the case to that state.
- Default. If no state fits any of the above, the state where the case is filed may proceed. This is the rare residual category, not a shortcut.
Because the ladder is ordered, filing first does not win. A parent who races to file in a newly arrived state generally loses the race to a properly filed case in the home state. Judges in the two states are also expected to communicate with each other about jurisdiction — a feature that surprises parents who assumed each court would decide in isolation.
Why the original state usually keeps control
Once a state issues a custody determination, it ordinarily retains exclusive continuing jurisdiction to modify it. That authority lasts until the issuing court decides that neither the child nor a parent has a significant connection to the state and that substantial evidence is no longer available there — or until a court determines that the child and both parents no longer live there.
The practical effect matters more than the phrasing. A parent who relocates with the child, lives in the new state for a year, and then asks the new state to rewrite the schedule will usually be told to go back to the issuing court while the other parent still lives in the original state. Our guide to post-judgment relocation disputes covers the substantive side of that fight; this article covers the courtroom-selection side, and the two are easy to confuse.
Watch out: a custody order and a child support order are governed by different statutes. Support jurisdiction runs under a separate uniform act with its own rules, so a case can properly be modified for custody in one state and for support in another. Do not assume one filing solves both.
Emergency jurisdiction: real, narrow, temporary
The UCCJEA also lets a court act where the child is physically present when the child has been abandoned, or when emergency protection is necessary because the child, a sibling, or a parent is threatened with or subjected to mistreatment or abuse. This provision is genuinely available and genuinely limited.
Two features define it. First, the order is temporary: it is meant to last long enough for the home state or the state with continuing jurisdiction to take over. Second, the courts are supposed to talk. The emergency court typically contacts the other state's court to set how long the temporary order remains in force and how the case moves back.
Emergency jurisdiction often runs alongside a protective-order petition, since a parent fleeing violence may need both immediate custody terms and a restraining order. The procedures are separate but frequently filed together; see our overview of civil protective orders and emergency relief. If child-protection authorities are involved as well, the federal Child Welfare Information Gateway collects state-by-state summaries of reporting and intervention laws.
Enforcing an order in another state
The second half of the statute's name — Enforcement — is the part parents actually use most. A valid custody determination from one state is entitled to recognition and enforcement in another, and the UCCJEA provides a registration procedure to make that practical.
- A certified copy of the existing order, plus any modifications, filed with the appropriate court in the new state.
- A sworn statement that, to the filer's knowledge, the order has not been modified.
- The name and address of the other parent and anyone else with custody or visitation rights, so notice can be given.
- Proof of the child's residence history for the relevant period, which most states require in an affidavit at the start of any custody case.
After notice, the other parent has a limited window to contest registration on narrow grounds — usually that the issuing court lacked jurisdiction, that the order was vacated or modified, or that notice was not properly given. Once registered, the order can be enforced as if the new state had issued it. Many states also offer an expedited enforcement process and, where a child is at risk of being removed from the state, a warrant to take physical custody of the child.
Practical step: register the order before you need it. A parent who relocates and registers the existing order in the new county has something a local police officer or school can act on immediately. A parent who waits until the child is not returned spends the first days on paperwork.
Sorting the three questions parents mix up
| Question | What decides it | Typical outcome |
|---|---|---|
| Which state can make the first custody order? | Home state priority, then significant connection | The state where the child lived for the six months before filing |
| Which state can change an existing order? | Exclusive continuing jurisdiction of the issuing state | The original state, until connections there are gone |
| Which state can enforce an order today? | Registration and enforcement provisions | Any state where the order is registered, including the child's current one |
Keeping these separate prevents the most common wasted filing: asking a new state to modify an order it can only enforce. Background on the underlying concepts is available in the Cornell LII entries on child custody and parental rights, while the Uniform Law Commission publishes the model text and tracks which states have enacted it.
Quick answers
We moved three months ago. Which state is the home state?
Almost certainly the state you left. The six-month clock looks backward from the filing date, and a state you have lived in for three months has not yet become the home state. The former state also retains home-state status for six months after the child leaves if a parent still lives there. Filing in the new state that soon usually produces a transfer, not a ruling.
Does the UCCJEA apply if the other parent is in another country?
State versions generally direct courts to treat a foreign country like a state for jurisdictional purposes, provided the country's custody process broadly respects notice and an opportunity to be heard. International cases also involve treaty mechanisms that operate separately from state law, so international abduction and return questions need their own analysis rather than a UCCJEA answer alone.
Can I get an emergency order in the state I just moved to?
Possibly, if the child is present there and faces abandonment or a genuine risk of mistreatment. Understand what you are getting: a temporary order intended to protect the child until the home state acts. It is not a route to permanent custody in a new state, and courts are alert to emergency petitions filed mainly to shift the case.
Both parents want the case moved to my state. Is that enough?
Agreement helps but does not control. Parents cannot simply consent their way into a court that lacks jurisdiction. The usual path is to ask the state with authority to decline as an inconvenient forum, which it can do after weighing factors such as where the evidence and witnesses are, the distance involved, and any history of domestic violence.
What documents should I gather before filing anything?
A residence history for the child covering at least the past five years with addresses and the people the child lived with, certified copies of every existing order from any state, school and medical records showing where the child's life is centered, and travel records explaining any absences. Most states require a sworn version of the residence history with the first pleading.
Your next moves
Map the child's last two years of addresses before you talk to anyone about filing, because that timeline usually determines the forum on its own. If an order already exists, start from the assumption that the issuing state still controls modification and look for evidence that would change that. If the immediate need is enforcement rather than change, register the order where you live now and keep certified copies with your travel documents.
From there, the substantive questions — schedules, decision-making, and support — follow the ordinary path described in our guides to parenting plans and relocation notice and starting a divorce case. Other state-court family topics are grouped in the family and personal affairs pathway.