When parents live in different states, custody is decided by the child’s “home state” — the state where the child has lived with a parent for the six months right before the case is filed. Every state follows the same framework, the Uniform Child Custody Jurisdiction and Enforcement Act (UCCJEA), and a federal statute called the Parental Kidnapping Prevention Act (PKPA) forces the other states to respect whatever that court decides. The practical effect is that only one state at a time can issue or change a custody order, no matter where the other parent moves.
Which State Is the Home State
The home state is where the child has lived with a parent for at least six consecutive months immediately before the custody petition is filed. If the child is younger than six months, the home state is wherever the child has lived since birth.
Short trips out of state — vacations, visits to grandparents, summer camp — don’t reset the clock. The UCCJEA treats them as temporary absences, and the six-month count keeps running. What matters is where the child’s life is actually based day to day.
One rule catches parents by surprise after a move. If the child leaves the state, the original state keeps home-state status for six more months, as long as one parent still lives there. That gives the parent left behind a window to file in the old state even though the child now lives somewhere else. Once those six months pass with no filing, and the child has been living continuously in the new state, the new state becomes the home state.
When No State Meets the Six-Month Test
Sometimes no state qualifies. The family may have moved twice in the past year, or the child may have been living abroad. In that case, a court can take jurisdiction if the child and at least one parent have a meaningful connection to the state and important evidence about the child — school records, doctors, close family — is available there. This “significant connection” basis is only available when no state qualifies as the home state. It can’t be used to override an existing home state.
The Emergency Exception
There is one situation where the home-state rule steps aside. If a child is physically present in a state and has been abandoned or abused, or faces threats of mistreatment, that state can exercise temporary emergency jurisdiction even if it isn’t the home state.1Office of Justice Programs. The Uniform Child-Custody Jurisdiction and Enforcement Act The protection also covers situations where a sibling or parent faces threats of abuse.
Emergency orders are temporary by design. If a custody case already exists somewhere else, the emergency court sets a deadline for the parent to get a proper order from the state that has jurisdiction. If no case exists anywhere, the emergency order can eventually become permanent once that state qualifies as the home state.
Why the Other Parent Can’t Just File in a Different State
The PKPA is what makes the system work across state lines. It requires every state to respect and enforce a custody order issued by another state’s court, as long as that court followed proper jurisdiction rules.2Office of the Law Revision Counsel. 28 U.S. Code 1738A – Full Faith and Credit Given to Child Custody Determinations When the federal statute conflicts with a state’s own custody law, the PKPA controls.
In practice, a parent cannot get a second custody order from a different state that contradicts the first. If State A properly issued the order, State B must enforce it, even if a judge in State B would have decided differently.
The UCCJEA also blocks a parent who tries to manufacture jurisdiction. If a parent takes a child to a new state without permission specifically to build a home-state claim, the court must decline jurisdiction. Judges enforce that “clean hands” rule aggressively.
Filing the Case
An interstate custody petition takes more paperwork than a typical local filing. Along with the petition itself, you file a sworn UCCJEA declaration — most states have a designated form — that lists the child’s residential history for the past five years. Every address, the dates the child lived there, and the names of the adults in the household. The judge uses that history to confirm which state has jurisdiction.
Accuracy on the declaration matters more than most parents realize. Gaps or inconsistencies give the other parent an opening to challenge jurisdiction, which can stall the entire case for months while two courts sort out who should be hearing it. Filing fees vary widely by state; the clerk assigns a case number and issues a summons directed at the other parent.
Even when a state technically qualifies, the judge can decline the case as an “inconvenient forum.” The court weighs how long the child has been outside the state, where the evidence sits, which court is most familiar with the family, and whether domestic violence has occurred and which state can better protect the parties.1Office of Justice Programs. The Uniform Child-Custody Jurisdiction and Enforcement Act If another state is clearly better positioned, the court can defer to it.
Serving the Out-of-State Parent
The other parent has to be formally notified through a process called service. For an out-of-state parent, that typically means hiring a professional process server or asking a sheriff’s office near the other parent’s address to hand-deliver the papers. Private process servers generally run about $20 to $100, though the cost climbs if the parent is hard to locate.
After delivery, whoever served the papers files a proof of service with the court. The other parent then has a set window to respond — commonly 20 to 60 days, depending on the state and the method of service. Out-of-state service usually comes with a longer response deadline than in-state service.
If the other parent doesn’t respond, you can ask the court for a default judgment. A default strips the non-responding parent of the right to participate, and the judge can sign final orders based on what your petition requested. You can’t ask for anything beyond what was in the original petition; adding requests means re-serving an amended version and restarting the response period. Courts also have special rules before defaulting an active-duty servicemember, covered further below.
Changing an Order After Someone Moves
Modifying an existing custody order follows stricter rules than the initial case. The state that issued the order holds “continuing exclusive jurisdiction,” which means it is the only court that can change the order.2Office of the Law Revision Counsel. 28 U.S. Code 1738A – Full Faith and Credit Given to Child Custody Determinations That stays true even after the child and one parent move. The point is stability: a parent shouldn’t be able to move and immediately shop for a new court to rewrite the terms.
The original state loses that authority in specific circumstances. The most common one is when neither parent nor the child still lives there. At that point, a new state that qualifies as the home state can take over. For the handoff to happen, either the original court formally declines jurisdiction or both parents consent to the new state handling the case. In practice, this usually means filing a motion in the original state asking the judge to release jurisdiction, then registering the existing order in the new state before asking for a modification.
Registering Your Order in a New State
Before a new state can enforce or modify an existing custody order, the order has to be registered there. Registration puts the new court on notice that a valid order already exists.
You send the new court a registration request, a certified copy of the order, and a sworn statement that the order hasn’t been modified since it was issued.1Office of Justice Programs. The Uniform Child-Custody Jurisdiction and Enforcement Act The court files the order as a foreign judgment and notifies the other parent.
The other parent has a short window, typically about 20 days, to contest the registration. The grounds are narrow:
- The court that issued the original order didn’t have proper jurisdiction.
- The contesting parent never received proper notice of the original proceeding.
- The order has been vacated, stayed, or modified since it was issued.
If nobody contests within the deadline, the registration is confirmed and the order becomes enforceable as if a local court had issued it.1Office of Justice Programs. The Uniform Child-Custody Jurisdiction and Enforcement Act
Child Support Is a Separate Question
Custody jurisdiction and child support jurisdiction are governed by different laws. The UCCJEA covers custody; child support runs on the Uniform Interstate Family Support Act (UIFSA). The two systems overlap only loosely, and it is possible to end up litigating custody in one state and support in another.
The biggest difference is that UIFSA requires personal jurisdiction over the parent who owes support, meaning the court needs some direct connection to that parent — residence, employment, or another qualifying tie. The UCCJEA requires no personal jurisdiction at all; it turns on the child’s home state regardless of where either parent lives. Like the UCCJEA, UIFSA follows a one-order-at-a-time principle: the state that issued the support order keeps exclusive authority to modify it as long as at least one party or the child still lives there. If your situation involves both custody and support across state lines, a family law attorney who handles interstate cases is worth the money; the jurisdictional overlap is genuinely confusing for lawyers too.
What a Long-Distance Parenting Plan Looks Like
Standard schedules like alternating weekends don’t work when parents live states apart. Long-distance plans consolidate the non-custodial parent’s time into fewer, longer blocks. Most give that parent the bulk of summer, a large portion of winter break, and alternating spring breaks. The specifics depend on the child’s age and school calendar, but the design goal is quality time over frequent short trips that wear everyone out.
Transportation logistics are where these plans either work or become a constant source of conflict. A well-drafted plan spells out who pays for travel, who books flights or drives, and who handles getting a young child to and from the airport. If the child will fly alone, the plan should address the airline’s unaccompanied-minor policies and minimum age requirements. Vague language like “parents shall share transportation costs” is practically an invitation to fight later; specific percentages or alternating responsibility work better.
Courts also expect a communication schedule for the time between visits. Video calls keep the relationship alive, and the details matter: how often, at what times, and on which platforms. The custodial parent is generally expected to make the child available for the scheduled calls and to give the child privacy during them. Terms like “reasonable times” without defined windows almost always lead to disputes.
When the Other Parent Violates the Order
Custody orders are enforceable across state lines. If the other parent interferes with your court-ordered time — refusing to hand over the child, not returning the child on schedule, blocking communication — the remedy is a contempt proceeding. A judge can order make-up parenting time, impose fines, or order jail time that the parent can avoid by complying with the order.
For repeated or serious violations, courts can modify the custody arrangement itself, award attorney’s fees to the parent forced to enforce the order, or suspend the violating parent’s licenses. This is where registration proves its worth: once your order is registered in the state where the violating parent lives, that state’s courts can enforce it directly.
Military Deployment
Active-duty parents get specific federal protections. The Servicemembers Civil Relief Act (SCRA) lets a deployed parent pause any custody proceeding for at least 90 days if military duties prevent them from appearing. The parent submits a statement explaining how their duties prevent attendance, along with a letter from their commanding officer confirming that leave isn’t available. Filing for the pause doesn’t count as appearing in court and doesn’t waive any defenses, including jurisdiction challenges. If the court denies a request for an additional pause, it must appoint an attorney to represent the servicemember.3Office of the Law Revision Counsel. 50 USC 3932 – Stay of Proceedings When Servicemember Has Notice These protections apply to initial cases and modifications alike.
On the jurisdiction side, a growing number of states have adopted the Uniform Deployed Parents Custody and Visitation Act, which says a parent’s residence doesn’t change because of deployment. Even without that statute, most courts treat deployment as a temporary absence rather than a change of residence, which prevents the non-military parent from using the deployment to claim the servicemember gave up home-state jurisdiction.
If a Parent Takes the Child Out of the Country
Interstate cases are complicated; international cases raise the stakes sharply. If one parent takes a child across a national border without the other’s consent, the main legal protection is the Hague Convention on the Civil Aspects of International Child Abduction, a treaty the United States shares with over 100 other countries.4Hague Conference on Private International Law. Convention of 25 October 1980 – Status Table
The Convention’s core rule is that children wrongfully removed to or kept in another country should be returned promptly to their home country, so the courts there can decide custody on the merits.5Office of the Law Revision Counsel. 22 USC Chapter 97 – International Child Abduction Remedies It doesn’t decide who gets custody; it decides where the custody case belongs.
In the United States, the International Child Abduction Remedies Act (ICARA) implements the Convention. A parent seeking return can file a petition in federal or state court wherever the child is located. The court can order the child’s return and require the parent who took the child to pay the other parent’s legal fees, court costs, and transportation expenses related to the return.5Office of the Law Revision Counsel. 22 USC Chapter 97 – International Child Abduction Remedies The Convention allows narrow exceptions, most notably a grave risk of harm to the child, but courts interpret those exceptions strictly.
If the other country isn’t a party to the Convention, the options shrink considerably. There is no treaty mechanism to compel return, and enforcement depends on the other country’s willingness to cooperate. Prevention works far better than reaction in those cases: court orders restricting international travel and passport holds through the U.S. State Department can stop the problem before it starts.