The Best Interests of the Child Principle
In divorce cases the primary criterion for custody is the child’s best interests. Under TCC Art. 182 the judge focuses on the child’s physical, mental, emotional and moral development rather than the parents’ interests.
This reflects Constitution Art. 41 on child protection and Art. 3 of the UN Convention on the Rights of the Child. Spouses’ fault does not matter for custody directly — only insofar as it affects the child’s development.
The Legal Distinction Between Fault and Custody
In divorce law fault is critical for financial outcomes such as compensation and maintenance, but it is not the main criterion for custody. The Court of Cassation stresses that conduct causing divorce is not alone enough for custody decisions.
Unless they harm the child’s development, adultery, breach of fidelity or marital conflict between the spouses do not automatically lead to loss of custody. Custody is not a penalty; it is a set of duties protecting the child’s rights.
- Adultery alone does not cause loss of custody
- Breach of fidelity is not decisive by itself
- Spousal conflict ≠ automatic custody loss
- Test: impact on the child’s development
When Fault Does Affect Custody
Although inter-spousal fault alone does not decide custody, conduct that directly harms the child’s interests becomes decisive. In such cases fault undermines parental fitness and becomes a strong criterion.
- Physical or psychological violence against the child
- Severe violence against the other parent in the child’s presence
- Chronic alcohol or substance addiction
- Serious breach of care and supervision duties
- Lifestyle endangering the child’s moral development
Expert Opinions and Court of Cassation Precedents
Custody proceedings look for concrete facts, not abstract claims. The child’s situation is assessed through social inquiry reports (SIR), pedagogue and psychologist evaluations, centred on the child’s interests rather than the spouses’ conflict.
Court of Cassation 2nd Civil Chamber, K. 2018/2808 (E. 2017/7222): the core principle is the child’s best interests; parents’ interests, divorce fault, moral judgments and social standing are considered only insofar as they affect that interest.
Same Chamber, K. 2019/11263 (E. 2019/7134): if the child’s and parents’ interests conflict, the child’s prevail; the link between fault finding and custody is indirect. This is general information; in Ankara, Karınca Law Firm in Çankaya recommends specialist support on custody strategy.
