
This study was prepared to analyze whether the right of custody can be waived in a consensual divorce protocol, and if so, whether a lawsuit can be filed later; the legal validity of one party waiving custody rights during the consensual divorce process and the effect of this waiver on the right to file a custody lawsuit in the future. In light of the presented Supreme Court and Constitutional Court decisions, the nature of custody rights, whether waiving this right is possible, and most importantly, how the principle of the child’s best interest guides this process have been examined.
A. Custody Arrangement and the Concept of “Waiver” in Consensual Divorce Protocols
In a consensual divorce protocol, the parties can make an arrangement regarding who will have custody of the joint child. In Supreme Court decisions, this situation is often described as one party “waiving” their custody claim. For example, in one decision, it was stated that the parties could declare through the protocol that “the woman waived her custody… claims” and that the court would accept this declaration as “in the nature of a waiver” (Supreme Court 2nd Civil Chamber, 2018/6126). This demonstrates that, in practice, it is possible for custody to be granted to the other spouse by agreement.
However, this “waiver” concept may seem to contradict the fundamental nature of custody rights. Indeed, the Constitutional Court has emphasized that custody is a fundamental right and cannot be transferred: “Custody is a right strictly personal to the individual. Therefore, it cannot be transferred to another, nor can it be inherited, and this right cannot be relinquished. Just as this right cannot be transferred to another, it also cannot be waived.” (Constitutional Court, 2010/119)
These two different approaches stem from the distinction in the use of the word “waiver”. While the Constitutional Court states the impossibility of an abstract renunciation of custody rights themselves; the Court of Cassation refers to the declaration of intent to leave the exercise of custody to the other parent, in relation to the specific situation at the time of divorce, as “waiver” . Furthermore, a more recent Court of Cassation decision, in a manner that eliminates this conceptual confusion, has stated that a declaration of waiver is meaningless because custody is related to public order, and the court will always decide by considering the child’s best interest (Court of Cassation 2nd Civil Chamber, 2024/4464).
B. Right to File a Lawsuit in the Future Even If Custody is Waived
The clearest finding common to all the reviewed decisions is that, the custody arrangement made with a consensual divorce protocol is not final and irreversible. The party who waives the right to custody or agrees to leave custody to the other spouse, does not lose the right to file a lawsuit for the modification of custody if certain conditions arise in the future. The fundamental condition for exercising this right is the child’s best interest and a significant change in circumstances and conditions. The Court of Cassation summarizes this situation as follows: “it has not been proven that a change in circumstances and conditions necessitating a change in the custodian occurred after the finalization of the divorce decree, nor has any reason been put forth indicating that the minor’s interest required such a change” (Court of Cassation 2nd Civil Chamber, 2009/2481). This statement indicates that a custody lawsuit can be filed and be successful if it is proven that the circumstances have changed and the child’s interest requires it. Indeed, in another decision, custody was ruled to be changed upon the mother’s request due to reasons such as the father, who had custody, neglecting his duties and the child wanting to live with the mother (Court of Cassation 2nd Civil Chamber, 2011/17064).
Guiding Principle: The Best Interest of the Child: Regardless of the agreement between the parties, the judge must find this agreement to be in the child’s best interest. As emphasized by the Court of Cassation, “Custody pertains to public order, and the principle of ex officio investigation applies. Therefore, even developments occurring during the trial must be taken into consideration.” (Court of Cassation 2nd Civil Chamber, 2023/5735). This principle requires the court not to be bound solely by the parties’ statements, but to make the most appropriate decision by, if necessary, obtaining social investigation reports, expert opinions, and the child’s statement if they are of an age of discernment.
“Legal Meaning of “Waiver”: The term “waiver” in the protocol does not mean the outright abolition of custody rights, but rather signifies consenting to the use of custody being granted to the other parent under the current circumstances. This consent is not absolute or indefinite. New circumstances, such as the parent granted custody neglecting their duties or the child’s physical or psychological development being endangered, would invalidate the old agreement and necessitate court intervention.
Conditions for Filing a Lawsuit: For a future custody modification lawsuit to be successful, it is not sufficient for the parent to have merely changed their mind. Concrete and serious facts, supported by evidence, must be presented to the court, demonstrating that, after the divorce decree became final, the custodial parent failed to properly perform their duties or that the child’s best interest requires a change.
Conclusion
In a consensual divorce protocol, one party may agree to relinquish custody to the other party. Although this situation is sometimes referred to as “waiver of custody” in the precedents of the Supreme Court, this does not mean that the right to custody has been absolutely and irrevocably relinquished. Since custody pertains to public order, the agreement of the parties is always subject to the judge’s approval and the principle of the child’s best interest.
Yes, the party who agreed to relinquish custody to the other spouse may file a lawsuit in the future. This waiver does not eliminate the right to file a lawsuit in the future. However, for such a lawsuit to be accepted, it is essential to prove with concrete evidence that a serious and fundamental change has occurred in the post-divorce conditions affecting the child’s best interest (e.g., neglect by the custodial parent, child abuse, negative conditions in health or education, etc.). The court has the authority to make a new custody arrangement in every case, considering the child’s current best interest. An article suggestion.

During the divorce process, especially in a consensual divorce protocol, how the right to custody will be arranged is an important matter. The parties may agree to relinquish custody to the other parent, but this does not constitute an absolute and irrevocable waiver of the right to custody. Therefore, the legal validity of agreements made regarding custody and potential future claims should be properly evaluated with the support of an expert lawyer. Otherwise, the child’s best interest may be jeopardized, or the parties may lose their rights in the future.
For individuals seeking a lawyer in Tuzla, Orhanlı, Aydınlı, Tepeören, Gebze, Çayırova, and Şekerpınar, local legal knowledge and experience gained in the regional courthouses provide a critical advantage. Since each court’s operations and practices can differ, working with a lawyer who understands regional dynamics and specializes in family law ensures the process is managed correctly.
At this point, working with an expert lawyer in their field plays a critical role in identifying potential legal risks beforehand and determining the most suitable strategy. Furthermore, in possible changes related to custody, it ensures you receive proper guidance on how new situations should be evaluated and under what conditions a lawsuit can be filed. In this way, the most accurate and legally compliant decisions can be made for both the child and the parties involved.




