International divorces involving children raise legal questions that are substantially more complex than ordinary custody disputes. When parents live in different countries, hold different nationalities, or intend to relocate after separation, the dispute is no longer limited to the question of which parent should exercise custody. Courts may also have to determine which country has jurisdiction, where the child is habitually resident, whether one parent may relocate the child abroad, whether the consent of the other parent is required, and whether a removal or retention of the child amounts to international child abduction.

These disputes are governed by an interaction of domestic family law, private international law, international conventions and, in European cases, EU legislation. Among the most important instruments are the 1980 Hague Convention on the Civil Aspects of International Child Abduction, the 1996 Hague Convention on Parental Responsibility and Protection of Children, the United Nations Convention on the Rights of the Child, and, within the European Union, Council Regulation (EU) 2019/1111, commonly known as Brussels IIb or Brussels II ter.

For families with a connection to Türkiye, Turkish private international law and Law No. 5717 on the Legal Aspects and Scope of International Child Abduction must also be considered.

1. Why International Child Custody Cases Are Different

In a purely domestic divorce, the same national legal system will usually determine divorce, parental responsibility, custody, visitation and the child’s place of residence.

International cases are fundamentally different.

For example, a Turkish mother and German father may have lived with their child in Germany for several years before separating. The mother may subsequently travel to Türkiye with the child and decide not to return. Alternatively, the parents may have lived in Türkiye, while one parent wishes to permanently relocate with the child to the United Kingdom, France or the United States after divorce.

Such cases immediately raise several separate legal questions:

• Which country’s courts have jurisdiction over parental responsibility?
• Where was the child’s habitual residence immediately before the dispute?
• Does one parent have the right to determine the child’s country of residence alone?
• Was the other parent’s consent required?
• Was the removal lawful when it occurred?
• If the initial journey was lawful, did the subsequent failure to return become wrongful retention?
• Must the child be returned under the 1980 Hague Convention?
• Can the parent opposing return rely on an exception such as grave risk?
• Which court will ultimately decide permanent custody?

The answers cannot normally be determined merely by asking which passport the child holds.

Modern international family law increasingly focuses on the child’s real centre of life, rather than nationality alone.

2. Habitual Residence: The Central Concept in International Child Custody

The concept of habitual residence is one of the most important connecting factors in international family law.

Under Article 5 of the 1996 Hague Child Protection Convention, the judicial or administrative authorities of the Contracting State where the child is habitually resident generally have jurisdiction to take measures for the protection of the child’s person or property. The Convention expressly includes custody, parental responsibility, the determination of the child’s residence and rights of access within its scope.

Habitual residence is therefore frequently more important than:

• the child’s nationality;
• the parents’ nationality;
• the country in which the child was born;
• the country where one parent owns property;
• or even the place where divorce proceedings were first contemplated.

Habitual residence is a factual concept

There is generally no single mathematical formula determining habitual residence.

The Court of Justice of the European Union has repeatedly described a child’s habitual residence as the place reflecting a sufficient degree of integration into a social and family environment. Courts must consider all circumstances of the particular child rather than relying exclusively on formal registration or parental declarations.

Relevant factors may include:

• the duration and regularity of the child’s residence in a country;
• school or nursery attendance;
• language;
• family relationships;
• friendships and social environment;
• medical and daily care arrangements;
• the parents’ employment and residence;
• accommodation;
• the reasons for moving to or remaining in a country;
• the child’s age;
• the intentions of the parents where demonstrated by objective conduct.

For infants and very young children, the circumstances of the parent or parents who provide their daily care may be particularly significant because the child’s social environment is closely connected with that caregiver.

Accordingly, habitual residence should not simply be equated with formal domicile, citizenship or immigration status.

A child may be a Turkish citizen but habitually resident in Germany. Likewise, a British child who has lived and attended school in Türkiye for several years may, depending on the facts, be habitually resident in Türkiye.

3. Can a Parent Take a Child Abroad Without the Other Parent’s Consent?

One of the most frequently misunderstood aspects of international custody law is whether a parent needs the other parent’s permission before travelling or relocating abroad with a child.

There is no universal answer.

The legal position depends on:

1. who holds parental responsibility or rights of custody;
2. the terms of any existing custody order;
3. the law of the child’s habitual residence;
4. whether the intended journey is temporary or permanent;
5. whether there are judicial restrictions concerning international travel;
6. whether the other parent’s legal rights include the right to participate in determining the child’s residence.

This distinction is extremely important.

Temporary travel and permanent relocation are not the same

A two-week holiday abroad may produce very different legal consequences from a permanent relocation.

Even where one parent agrees that the child may travel abroad temporarily, that consent does not necessarily mean that the parent has consented to the child permanently remaining abroad.

For example, a father may consent to his child travelling from Germany to Türkiye during the summer holiday between 1 July and 31 July. The initial departure may therefore be lawful.

However, if the mother refuses to return the child after 31 July in breach of the father’s rights of custody, the issue may become one of wrongful retention even though there was no wrongful removal on the date the child originally travelled.

For this reason, written consent should preferably identify:

• the destination country;
• departure and return dates;
• the purpose of travel;
• the child’s accommodation;
• the person travelling with the child;
• and whether the consent is for temporary travel only.

4. Relocation Abroad After Divorce

Permanent international relocation is considerably more serious than ordinary travel.

A parent may wish to relocate because of employment, remarriage, education, family support, financial conditions or immigration opportunities. The proposed move may nevertheless substantially affect the child’s relationship with the other parent.

Courts dealing with international relocation commonly evaluate factors such as:

• the child’s best interests;
• the child’s relationship with both parents;
• the reasons for the proposed relocation;
• whether the relocation is genuine rather than designed to frustrate contact;
• education and healthcare arrangements in the destination country;
• language and cultural integration;
• housing and financial stability;
• the feasibility and cost of international visitation;
• school holidays and travel schedules;
• the ability of the child to maintain meaningful contact with the non-relocating parent;
• the age and views of the child.

The existence of custody in favour of one parent should therefore not automatically be treated as a universal licence to change the child’s country of residence.

The precise legal position depends on the nature of parental responsibility under the applicable law and the custody judgment itself.

Where both parents possess rights concerning the determination of the child’s residence, unilateral permanent relocation may constitute a breach of custody rights.

5. International Child Abduction Under the 1980 Hague Convention

The 1980 Hague Convention on the Civil Aspects of International Child Abduction is the principal international instrument governing wrongful cross-border removal and retention of children.

Its objective is not to determine which parent should ultimately receive custody.

Instead, the Convention seeks to:

1. secure the prompt return of children wrongfully removed to or retained in another Contracting State; and
2. ensure that custody and access rights existing under the law of one Contracting State are effectively respected in other Contracting States.

The Convention applies to children under the age of 16 who were habitually resident in a Contracting State immediately before the alleged breach of custody rights.

When is removal or retention wrongful?

Under Article 3 of the Convention, removal or retention is wrongful where:

• it breaches rights of custody existing under the law of the State where the child was habitually resident immediately before the removal or retention; and
• those custody rights were actually being exercised, or would have been exercised but for the removal or retention.

Rights of custody may arise through:

• legislation;
• a judicial decision;
• an administrative decision;
• or an agreement having legal effect.

The Convention expressly states that custody rights include the right to determine the child’s place of residence.

6. A Hague Return Case Is Not a Custody Trial

This distinction is critical.

A Hague Convention court is generally not deciding which parent is the better parent or with whom the child should permanently live.

Article 19 of the 1980 Convention expressly provides that a decision concerning the return of a child is not a determination on the merits of custody. Moreover, after authorities have received notice of an alleged wrongful removal or retention, Article 16 restricts the authorities of the requested State from determining the merits of custody until the return issue has been resolved.

The central question is therefore usually:

Was the child wrongfully removed from or retained outside the State of habitual residence?

If the answer is yes and no Convention exception applies, the normal objective is to return the child to the State of habitual residence so that custody can be decided by the appropriate courts there.

This mechanism is intended to discourage parents from creating jurisdiction through unilateral removal.

7. The Importance of Acting Quickly

Time can become decisive in international child abduction proceedings.

Under Article 12 of the 1980 Hague Convention, where less than one year has elapsed between the wrongful removal or retention and commencement of return proceedings, the competent authority should order the child’s return forthwith, subject to the Convention’s exceptions.

Even after one year, return remains the general rule unless it is demonstrated that the child has become settled in the new environment.

The Convention also requires authorities to act expeditiously and establishes a six-week benchmark after which an applicant may seek reasons for delay if no decision has been reached.

Consequently, a parent who believes that a child has been wrongfully taken abroad should obtain legal advice immediately rather than waiting for negotiations to continue indefinitely.

Delay can affect both legal arguments and evidentiary circumstances.

8. Exceptions to the Return of a Child

The Hague Convention is designed around prompt return, but return is not automatic in every case.

Article 13 identifies several important exceptions.

A court is not bound to order return where the person opposing return proves, for example, that:

• the applicant was not actually exercising custody rights;
• the applicant consented to the removal;
• the applicant subsequently acquiesced in the removal or retention;
• or there is a grave risk that return would expose the child to physical or psychological harm or otherwise place the child in an intolerable situation.

The court may also refuse return where a sufficiently mature child objects to returning and has reached an age and degree of maturity at which it is appropriate to take the child’s views into account.

Article 20 additionally permits refusal where return would violate fundamental principles of the requested State relating to the protection of human rights and fundamental freedoms.

These exceptions should not, however, transform a Hague return case into an ordinary custody trial.

A parent resisting return generally cannot succeed merely by arguing that:

• the destination country provides better schools;
• the child now has a more comfortable house;
• the relocating parent earns more money;
• or the child would prefer remaining with the abducting parent.

The legal threshold—particularly for the grave-risk exception—is substantially more demanding.

9. The Best Interests of the Child

The principle of the best interests of the child remains central to international family law.

Article 3 of the United Nations Convention on the Rights of the Child provides that the child’s best interests must be a primary consideration in actions concerning children. Article 12 recognises the right of children capable of forming their own views to express those views in proceedings affecting them, with appropriate weight being given according to age and maturity.

However, the best-interests principle operates somewhat differently in an ordinary custody case and a Hague return case.

In a custody case, the court may conduct a comprehensive assessment of the child’s future living arrangements.

In Hague proceedings, the Convention itself reflects a policy judgment that children should ordinarily be returned promptly to the country from which they were wrongfully removed so that custody questions may be resolved by the appropriate jurisdiction.

Accordingly, the requested court must combine protection of the individual child with the international objective of preventing unilateral forum shopping through child abduction.

10. The 1996 Hague Child Protection Convention

The 1996 Hague Convention on Jurisdiction, Applicable Law, Recognition, Enforcement and Co-operation in Respect of Parental Responsibility and Measures for the Protection of Children complements the 1980 Convention.

Unlike the 1980 Convention, which focuses heavily on wrongful removal and return, the 1996 Convention creates a broader framework for:

• jurisdiction;
• parental responsibility;
• custody;
• access;
• protective measures;
• recognition;
• enforcement;
• and international cooperation.

It applies from the child’s birth until the age of 18.

Its starting principle is that the authorities of the country of the child’s habitual residence have jurisdiction to take protective measures.

Importantly, Article 7 provides that after a wrongful removal or retention, the authorities of the State where the child was habitually resident immediately before the abduction generally retain jurisdiction until specified conditions for a lawful jurisdictional shift are satisfied.

This prevents an abducting parent from easily creating a new custody jurisdiction merely by crossing an international border.

11. The European Union: Brussels IIb Regulation

For disputes falling within the European Union framework, Council Regulation (EU) 2019/1111, known as Brussels IIb or Brussels II ter, provides important rules on parental responsibility, recognition and enforcement of judgments and international child abduction.

The Regulation applies, subject to its transitional rules, to proceedings instituted on or after 1 August 2022.

It defines parental responsibility broadly and expressly recognises that rights of custody include the right to determine the child’s place of residence. Wrongful removal or retention similarly depends on whether rights of custody existing in the child’s previous habitual residence were breached.

EU law therefore operates alongside the Hague system and provides additional procedural mechanisms in relevant intra-EU disputes.

Türkiye is not an EU Member State and Brussels IIb does not directly govern Turkish courts. Nevertheless, it may be highly relevant where one side of a dispute involves an EU Member State, while Turkish courts apply Turkish private international law and the applicable Hague Conventions.

12. International Child Custody Disputes Involving Türkiye

Türkiye is a party to both major Hague instruments discussed above.

The 1980 Hague Child Abduction Convention entered into force for Türkiye on 1 August 2000.

Türkiye subsequently ratified the 1996 Hague Child Protection Convention, which entered into force for Türkiye on 1 February 2017.

When dealing with an individual case, practitioners should also verify whether the relevant Convention is operational between the specific States concerned, particularly where accession and acceptance mechanisms are relevant.

Turkish Private International Law

Under Article 14 of Turkish Law No. 5718 on Private International Law and International Civil Procedure, divorce and its consequences are generally governed first by the spouses’ common national law; where their nationalities differ, the law of their common habitual residence applies, and in its absence Turkish law applies. Article 14(3) provides that custody issues arising from divorce are subject to the same conflict-of-laws structure. Temporary measures are governed by Turkish law.

In international custody disputes, however, this domestic conflict rule must be examined together with Türkiye’s treaty obligations, particularly the 1996 Hague Convention where its scope is engaged.

13. Hague Child Abduction Proceedings in Türkiye

The Turkish implementation framework for the 1980 Hague Convention is principally contained in Law No. 5717 on the Legal Aspects and Scope of International Child Abduction.

The Law regulates the procedure for securing the return to the State of habitual residence of children who have been removed or retained in violation of custody rights.

Türkiye’s designated Central Authority is the Ministry of Justice, Directorate General for Foreign Relations and European Union Affairs. The Ministry carries out Convention functions through local public prosecutors’ offices.

Applications may generally be initiated through:

• the Central Authority of the child’s habitual-residence State; or
• the Central Authority of the Contracting State where the child has been wrongfully taken or retained.

Turkish Law No. 5717 provides that family courts have jurisdiction over proceedings falling within the legislation.

The legislation also permits protective measures designed to prevent further movement of the child while proceedings remain pending.

These may include:

• temporarily preventing the child from leaving Türkiye;
• preventing the issuance or renewal of a passport;
• restricting changes to school, residence or registration records;
• taking custody of passports or identity documents;
• requiring the child to be periodically presented to competent authorities;
• and other necessary protective measures.

Following amendments introduced in 2021, execution of child-return and personal-contact decisions is handled within the child-delivery framework involving judicial support and victim services rather than the traditional enforcement-office model, with child-development and social-service professionals involved where appropriate.

14. Evidence in International Custody and Child Abduction Cases

Evidence concerning habitual residence and parental consent is often decisive.

Documents that may become relevant include:

• custody judgments;
• divorce judgments;
• parental responsibility agreements;
• birth certificates;
• school and nursery records;
• medical records;
• residence permits;
• immigration records;
• airline tickets;
• passport entry and exit records;
• employment documents;
• tenancy agreements;
• utility records;
• correspondence between the parents;
• WhatsApp, SMS and email messages;
• written travel permissions;
• evidence identifying the agreed return date;
• evidence of the child’s social and family environment;
• witness statements;
• evidence concerning domestic violence or risks to the child.

Particularly in wrongful-retention cases, correspondence exchanged before and after the agreed return date can become crucial.

A message such as “You may take the child to Türkiye for the summer, but she must return before school begins” may have entirely different legal significance from unconditional written approval for permanent relocation.

15. The Child’s Wishes

The wishes of a child can be important but are not automatically decisive.

International law does not generally establish a fixed age at which a child receives an absolute right to determine the country in which he or she will live.

Instead, courts normally consider:

• age;
• maturity;
• ability to understand the dispute;
• consistency of the child’s views;
• whether the views appear independently formed;
• whether one parent has exerted pressure or influence;
• and the consequences of the proposed decision.

Article 12 of the UN Convention on the Rights of the Child requires that a child capable of forming views have an opportunity to express them, with those views receiving weight according to age and maturity.

The 1980 Hague Convention similarly permits a court to refuse return when the child objects to returning and has reached an age and maturity at which it is appropriate to take those views into account.

However, an objection to living with a particular parent is not necessarily identical to an objection to returning to a particular country.

The distinction may be legally significant.

16. Recognition and Enforcement of Foreign Custody Decisions

Obtaining a custody decision in one country does not always end the dispute.

The judgment may subsequently have to be recognised or enforced abroad.

The applicable procedure depends on:

• the States involved;
• international conventions;
• regional instruments;
• bilateral treaties;
• and domestic private international law.

The 1996 Hague Convention provides a framework for recognition and enforcement of child-protection measures between Contracting States, while Brussels IIb significantly facilitates recognition and enforcement between EU Member States within its scope.

Where enforcement is sought in Türkiye, Turkish rules on the recognition and enforcement of foreign judgments and applicable international conventions must be examined together.

This is why international custody strategy should be considered before litigation begins rather than after a judgment has already been obtained.

17. Preventing International Child Abduction

When there is a genuine risk that a parent intends to remove a child permanently from the country, preventive measures may be as important as later return proceedings.

Depending on the jurisdiction and circumstances, legal counsel may consider requesting measures concerning:

• travel restrictions;
• surrender of passports;
• restrictions on issuing new passports;
• restrictions on changing the child’s residence;
• notification of relevant authorities;
• temporary custody orders;
• detailed international-contact arrangements;
• written undertakings regarding return dates.

In Türkiye, Law No. 5717 expressly provides for several interim protective measures during international return proceedings, including temporary restrictions on international departure and passport procedures.

Preventive proceedings can be particularly important where there is evidence that a parent has:

• purchased one-way tickets;
• terminated employment or accommodation;
• removed the child from school;
• obtained foreign immigration documents;
• transferred assets abroad;
• concealed travel plans;
• previously threatened not to return the child.

18. What Should a Parent Do After a Child Is Taken Abroad?

Speed and coordination are critical.

A parent facing a potential international child-abduction case should generally seek to establish immediately:

1. the child’s habitual residence immediately before removal;
2. the precise date of removal or wrongful retention;
3. the nature of each parent’s custody rights;
4. whether consent was given and, if so, its limits;
5. whether the destination country is bound by the relevant Hague Convention in relation to the State of habitual residence;
6. the child’s current location;
7. whether protective measures are necessary;
8. which Central Authority and courts are competent.

A Hague application may be made through the relevant Central Authority, although Article 29 of the 1980 Convention does not prevent a person claiming breach of custody rights from applying directly to competent judicial or administrative authorities where permitted.

The legal strategy should also anticipate any potential arguments concerning consent, acquiescence, grave risk, settlement or the child’s objections.

Conclusion

International divorce involving children cannot be analysed solely as a traditional custody dispute.

The central legal questions frequently concern jurisdiction, habitual residence, parental responsibility and the legality of cross-border relocation.

The concept of habitual residence is particularly important because international law generally seeks to preserve the jurisdiction of the country representing the child’s genuine centre of life. A parent cannot normally create a new custody jurisdiction simply by removing the child to another country.

The 1980 Hague Convention therefore establishes a mechanism aimed at promptly returning children who have been wrongfully removed or retained, while the 1996 Hague Convention provides a broader framework governing parental responsibility, jurisdiction and child-protection measures.

At the same time, the child’s best interests, safety, maturity and right to be heard remain fundamental considerations.

Cases involving Türkiye require an additional analysis of Turkish private international law, Law No. 5717 and Türkiye’s obligations under the Hague Conventions.

Most importantly, international travel, permanent relocation and wrongful retention must not be treated as the same legal concept. A parent may lawfully take a child abroad for a temporary visit yet subsequently commit wrongful retention by refusing to return the child. Conversely, whether consent from the other parent is legally necessary depends on the actual custody and parental-responsibility rights existing under the law of the child’s habitual residence.

For this reason, parents contemplating international relocation—and parents concerned that a child may be removed abroad—should obtain cross-border family-law advice before irreversible steps are taken. In international child custody disputes, the country in which proceedings are commenced, the timing of the application and the evidence establishing the child’s habitual residence may ultimately determine the course of the entire case.

Disclaimer: This article provides general information concerning international family law and does not constitute legal advice. The applicable rules may differ depending on the child’s habitual residence, nationality, the countries involved, existing custody orders and the international treaties in force between the relevant States.