The Hague Convention is an international treaty that governs the return of children wrongfully taken to or kept in another country. It does not decide custody. It determines if a child should be sent back to the country where they were living so that custody can be resolved there.
California has a very structured public-agency system for Hague Convention cases, which is coordinated through the Attorney General’s Child Abduction Unit, local district attorneys, and the U.S. State Department.
A federal law called the International Child Abduction Remedies Act (ICARA) allows parents to file Hague petitions in either federal or state court in California.
Roughly half of California’s international child abduction cases involve Mexico, and the state has built dedicated infrastructure to handle those cases.
Your co-parent just left the country with your child. No warning, no discussion, no return date. Or you’ve been living abroad with your child, and a petition just arrived demanding you send them back to a country you left for serious reasons. Either way, the legal questions hit fast.
Where do you file? Which court handles this? How long do you have? And what does California law say about any of it?
The Hague Convention on the Civil Aspects of International Child Abduction is the international treaty that governs these situations. This guide walks through how the entire Hague Convention process works in California, from both sides.
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What Is the Hague Convention on Child Abduction?
The Hague Convention on the Civil Aspects of International Child Abduction is an international treaty designed to ensure the prompt return of children who have been wrongfully taken from, or kept in, a country other than the one where they were living. More than 100 countries have signed on, including the United States, which joined the treaty in 1988.
The Convention exists to do three things:
- Get the child back to the country where they were living as quickly as possible
- Make sure custody and visitation rights from one member country are respected in others
- Discourage parents from taking a child across borders to find a court more likely to rule in their favor
Two threshold rules matter right away.
- The Convention applies only to children who were habitually resident in a Contracting State and who are under 16; it ceases to apply once the child turns 16.
- It also only works between countries that are actually Hague treaty partners with each other. A country being party to the Convention is not enough; the United States must have accepted that country as a Hague Abduction Convention “treaty partner” for the Convention process to apply in U.S. courts.
One thing the Convention does not do is decide custody. A Hague case is not a trial about who the better parent is or where a child should live permanently. The entire purpose is to answer one question: Should this child be returned to the country where they were living so that the courts there can handle the custody case? Article 19 of the Convention says this explicitly. A return order is not a custody ruling.
Because the Convention is a treaty between countries, each member country needs its own law to put the treaty into practice. In the United States, that law is the International Child Abduction Remedies Act, or ICARA (22 U.S.C. §§ 9001–9011). ICARA is what gives parents the right to file a Hague petition in an American courtroom, and it allows those petitions to be heard in either federal or state court.
California also has the Uniform Child Custody Jurisdiction and Enforcement Act (UCCJEA), in Family Code sections 3400–3465, which governs when California can take a custody case and how it enforces other courts’ custody orders. But in a Hague case, the first question is not who should get custody long-term. The first question is whether the child should be returned to another country under the Hague Convention and ICARA.
Once the court decides the return issue, long‑term custody is handled later by the court with proper authority under the UCCJEA.
How the Convention is Set Up
Every country that has signed the Convention is required to designate a government agency, called a Central Authority, to handle Hague cases. That agency’s job is to receive applications from parents, help locate children, encourage voluntary returns when possible, and coordinate with other countries to move the case forward.
In the United States, the Central Authority is the U.S. State Department’s Office of Children’s Issues. In California, the Attorney General’s Child Abduction Unit works alongside the State Department and local district attorneys to process cases on the ground. That California-specific structure is covered in detail later in this guide.
A parent whose child has been taken can file a return application with the Central Authority in the child’s home country or in the country where the child is believed to be. The Central Authority then works with its counterpart in the other country to locate the child, attempt a voluntary resolution, and if needed, help start court proceedings. Parents can also skip the Central Authority process entirely and file a Hague petition directly in court.
Hague cases are supposed to move quickly. Article 11 of the Convention sets the expectation that courts act expeditiously, and if no decision is reached within six weeks after proceedings begin, the applicant may request a statement explaining the delay.
What Makes a Removal or Retention of a Child “Wrongful”?
Under the Hague Convention, taking or keeping a child in another country is wrongful if it violates the other parent’s custody rights under the law of the child’s home country, and that parent was exercising those custody rights at the time, or would have been if the child hadn’t been taken.
A parent does not need to have obtained a custody order in order to file a Convention application. If the law of the child’s country of habitual residence gave both parents custody rights by default, that is enough.
The Convention also distinguishes between custody rights and access rights.
- Custody rights include the right to decide where the child lives. These are the rights that trigger return claims.
- Access rights are narrower and usually involve visits or parenting time. If the dispute is about contact rather than wrongful removal or retention, the Hague Convention offers a separate process through the Central Authorities to help protect and enforce those rights across borders instead of ordering a child’s return (court action is also available, if needed). In California, that can also involve asking the court to recognize and enforce a foreign custody order under the UCCJEA.
For example, if both parents and their child were living in France, and one parent takes the child to Los Angeles for a short trip but then refuses to return, the other parent may be able to bring a Hague claim if French law gave them custody rights and they were actively involved in the child’s life.
International Child Custody: What You Need to Know
Read NowHow California Courts Determine “Habitual Residence”
Before a court can decide whether a child was wrongfully removed or kept, it has to decide where the child was habitually resident. In simple terms, that means where the child was truly at home before the dispute. That habitual residence determines which country’s law applies, which country’s courts should handle the custody dispute, and which direction the child should be returned.
The Convention does not define habitual residence. It was left intentionally open so that courts in each country can make fact-specific determinations. That flexibility means different courts have developed different approaches, but they are all trying to answer the same question: where was this child really living their life?
There is no single checklist and no rule that parents must have a written agreement. For older children, things like school, daily routine, and community ties carry weight. For babies and very young children, the parents’ living situation, caregiving roles, and how stable the home is usually matter more.
When deciding habitual residence, the court looks at the whole picture, including:
- Where the child was actually living: The court looks at where the child was spending day‑to‑day life before the alleged wrongful removal or retention.
- Whether the move was temporary or permanent: It matters whether the move was a short visit, trial stay, or clearly temporary arrangement, versus a true relocation where the family meant to start a new life in a new country.
- The child’s routine and connections: The court may consider school or daycare, medical care, activities, home life, friendships, and extended family ties, and how settled the child appeared in that place.
- What the parents said and did: This is especially important for very young children. The court may look at whether both parents agreed to the move, signed a lease, enrolled the child in school, made long‑term plans, or instead treated the move as temporary.
These factors in California are shaped mainly by two important cases: Mozes v. Mozes from the Ninth Circuit and Monasky v. Taglieri from the U.S. Supreme Court.
Mozes v. Mozes (Ninth Circuit)
In Mozes v. Mozes, 239 F.3d 1067 (9th Cir. 2001), an Israeli family agreed that the mother would take the children to California for about 15 months so they could have an “American experience.” The father said he never agreed to a permanent move; after the children had been in California for over a year, the mother decided to stay and not return them to Israel.
The Ninth Circuit treated shared parental intent as central. It held that a child does not usually gain a new habitual residence just because they live in a place for a period of time if the parents never jointly intended to abandon the old home and settle in the new one. Under Mozes, courts asked: did both parents have a shared, settled plan to relocate the child, and was that plan actually carried out?
Monasky v. Taglieri (U.S. Supreme Court)
In Monasky v. Taglieri, 140 S. Ct. 719 (2020), an American mother and Italian father lived in Italy, where their baby was born; the relationship was abusive, and the mother fled to the U.S. with the infant. She argued there was no habitual residence in Italy because the parents never had a clear agreement that Italy would be the child’s home.
The Supreme Court rejected any rule that requires a formal or “actual” parental agreement. It held that a child’s habitual residence must be decided based on the totality of the circumstances in each case, and that no single fact, like parental intent, is automatically controlling.
For very young children, courts should focus on the parents’ caregiving and the stability of life in the country; for older children, judges should weigh school, friendships, activities, and other connections.
For California families, this means judges still look at parental intent the way Mozes described, but they now do so inside Monasky’s broader “whole picture” test. Parental intent is important, but it is only one piece of the overall habitual‑residence analysis.
Why This Decision Comes First
Habitual residence is decided before anything else in a Hague case. If the court finds that the child was not habitually resident in the country seeking return, the Hague application fails at the threshold. This is why the factual record around where the family was living, how long they had been there, the child’s routine, and what both parents understood about the arrangement is so important in California Hague cases.
How a Hague Case Works in California
Once a parent decides to pursue a return under the Convention, the process takes one of two routes: filing through the Central Authority system or going directly to court. California has a structured process for both, and it differs depending on which direction the child was taken.
If Your Child Was Brought to California (Incoming Cases)
Incoming cases are those where a child has been wrongfully removed from another country and is believed to be in California. The process works like this:
Step 1: The Hague application is sent to California
The Central Authority in the child’s home country sends the Hague Convention application to the U.S. State Department’s Office of Children’s Issues. That office then sends it to the California Attorney General’s Child Abduction Unit for review.
Step 2: California reviews the case and sends it to the local county
The Attorney General’s Child Abduction Unit checks the application, asks for any missing information, and sends the case to the district attorney’s child abduction unit in the county where the child is believed to be.
Step 3: Authorities work to find the child
A district attorney investigator works to find the child. During this stage, the Attorney General’s office continues to monitor the case and provide support.
Step 4: The court process begins
If the child is found, the district attorney’s office decides how to proceed based on the risk that the taking parent may leave again with the child. If the risk appears low, the parent is usually served with notice of the Hague case and a court date is set.
If the risk appears high, the office may ask the court for a protective custody warrant directing law enforcement to take the child into protective custody to prevent removal from the jurisdiction.
Step 5: The judge decides the return issue
At the hearing, the court decides whether the child should be returned to the country of habitual residence under the Hague Convention. A deputy district attorney may appear, and both parents can also have private attorneys.
The Convention encourages voluntary returns at every stage of this process, and many cases do resolve without a full hearing. Article 10 specifically directs Central Authorities to take appropriate measures to secure a voluntary return.
If Your Child Was Taken from California (Outgoing Cases)
The process runs in the opposite direction when a child has been wrongfully removed from California to another country. The district attorney’s office in the county where the child was living helps the left-behind parent prepare a Convention application.
That application is routed to the U.S. State Department, which transmits it to the Central Authority in the country where the child is believed to be. The DA’s office then helps the parent monitor the case, provide additional documentation, and coordinate the logistics of return as the foreign Central Authority processes the application.
Because roughly half of California’s international child abduction cases involve Mexico, the AG’s office has built specific infrastructure for these cases. A dedicated Child Abduction Coordinator for Mexico works directly with the U.S. Embassy in Mexico City and the Mexican Foreign Ministry.
Special agents from the AG’s Foreign Prosecutions and Law Enforcement Unit (FPLEU) can accompany DA investigators traveling to Mexico to recover a child. The California Attorney General identifies FPLEU as the law‑enforcement point of contact for Hague Convention child abduction cases, which helps explain why California’s process is more structured than in many other states.
Child Support Across Borders: California & Mexico
Read NowFiling Directly in Court
Parents are not limited to the Central Authority system. A parent can also file a Hague petition directly in court. In California, that means either federal court (U.S. District Court) or state family court.
Both apply the same Convention and ICARA framework. Federal court may be faster in some districts. State courts may have more familiarity with family law facts and local circumstances. Access cases are generally brought in state court.
What One Year Can Do
The one‑year mark matters enormously. Under Article 12, if a Hague return case is filed within one year of the wrongful removal or retention, the court must order the child returned, assuming the Convention’s other requirements are met.
After one year, the court may still order a return, but the taking parent can argue that the child is now settled in the new environment. If the court agrees the child is settled, it has discretion to deny return. In practical terms, delay can seriously weaken the left‑behind parent’s case.
What Are the Defenses to a Hague Return Order?
Even when a removal is wrongful, the Convention does not require return in every case. Articles 12, 13, and 20 set out limited exceptions, also called defenses, that allow a court to refuse a return order. These defenses are interpreted narrowly, and the parent opposing return carries the burden of proof.
Under ICARA, the parent asking for return must prove wrongful removal or retention, while the parent opposing return must prove any defense, often under a higher evidentiary standard depending on the defense raised.
The most commonly raised defenses include:
- The left-behind parent agreed to the move or accepted it after the fact.
- Returning the child would expose them to serious physical or psychological harm or an intolerable situation.
- The child objects to returning and is old enough and mature enough for the court to consider their views. A simple preference for the new country is not enough.
Proving one of these defenses removes the treaty obligation to return the child, but it does not automatically end the case. The court still has discretion to order a return. For a full breakdown of each defense and additional ones, the evidence courts require, and how these defenses have played out in California cases, see our detailed guide: Hague Convention Child Abduction Defenses in California.
The International Child Abduction Prevention and Return Act (ICAPRA, 22 U.S.C. § 9101 et seq.) provides additional federal tools for prevention and response, including mechanisms for reporting and tracking cases at the federal level.
What If the Other Country Has Not Signed the Convention?
The Hague Convention only operates between countries that have both signed and accepted each other’s participation in the treaty. If the other parent took your child to a country that is not a signatory, the Convention process is not available to you.
In those cases, the options are different, and the process is often more difficult. You may need to work through the U.S. State Department’s Office of Children’s Issues, pursue diplomatic channels, or rely on the legal system of the non-signatory country. California courts can still issue protective orders under Family Code § 3048, and California prosecutors can bring criminal charges under Penal Code §§ 278 and 278.5 for unlawful child taking.
Courts in California are also more cautious about approving relocation requests to non-signatory countries. Because custody orders are harder to enforce in those jurisdictions, judges tend to weigh the enforceability question heavily when a parent asks to move a child abroad.
Need Help with a Hague Convention Case in California?
If you believe your child has been wrongfully taken to or kept in another country, act quickly. California parents can seek help through their local District Attorney’s Office and the U.S. Department of State’s Office of Children’s Issues.
It also helps to gather important records as early as possible, including custody orders, written agreements, proof of custodial rights, birth certificates, recent photographs, and school or medical records. Some documents may need certified copies or translations.
Hague Convention cases move quickly, and delays can affect both the legal strategy and the outcome. Whether you are trying to secure your child’s return or responding to a return petition, early legal guidance matters.
At Provinziano & Associates, we represent both petitioning and responding parents in Hague Convention cases involving countries across Europe, Asia, Latin America, and beyond. We work with Central Authorities, foreign counsel, consulates, and California courts in high-stakes international child abduction matters.
Schedule a case evaluation to discuss your situation with a team that handles Hague Convention cases in California.
See how we handle international child custody cases.
FAQs: The Hague Convention on the Civil Aspects of International Child Abduction
Does the Hague Convention decide who gets custody?
No. The Convention only determines if a child should be returned to the country where they were living before the removal. Custody is decided separately by the courts in that country. A Hague return order is not a ruling on which parent is better or where the child should live permanently. Article 19 of the Convention states this directly.
Can I file a Hague petition in state court, or does it have to be federal?
Both. The International Child Abduction Remedies Act (ICARA) gives California state courts and federal district courts equal authority to hear Hague return petitions. The choice between them can depend on the court’s calendar, the judge’s familiarity with international cases, and the litigation strategy that best fits your situation.
How long does a Hague case take in California?
The Convention expects decisions within six weeks of the start of proceedings. In practice, California Hague cases can take several weeks to several months, depending on the defenses raised, how contested the habitual residence question is, and the court’s schedule. If a decision is not reached within six weeks, you have the right to request a written explanation for the delay.
What is “habitual residence” and why does it matter?
Habitual residence is the country where your child was really living before the alleged wrongful removal or retention. It is the foundation of the entire Hague case because it helps determine which country’s law applies and where custody should usually be decided. Courts do not use one rigid rule. They look at the full picture, including the child’s day-to-day life and, especially for very young children, the parents’ living arrangements and caregiving situation.
