Collusion is one of the validity conditions required for all legal transactions. However, the issue of deceased collusion is a special issue and requires separate explanation. Although the collusion of the deceased is not regulated separately within the provisions of inheritance law, the subject is shaped by the provisions of the Turkish Code of Obligations regarding collusion, as well as the situations encountered in practice and the decisions of the Supreme Court.

Muris collusion is the presentation of unrequited transactions before the official authorities as maintenance until death or sales contracts in order to prevent the heirs from gaining their inheritance rights. To explain in detail, the inheritor; He transfers the goods that he wants to donate or, in other words, to kidnap, to someone else by transferring them through sale, thus preventing the heirs with reserved shares from filing a lawsuit to obtain their inheritance rights in the future. In such cases, while the apparent sales contract is invalid because the real will of the deceased is to donate; The confidential donation agreement is also invalid due to irregularity. Against this issue, which usually arises after the death of the deceased, the heirs may file a lawsuit for the correction of improper registration due to collusion, or as it is known in practice, for title deed cancellation and registration, in order to cancel the fraudulent transaction carried out by the testator and return the relevant goods or their value to them. Since the right to property is one of the primarily protected rights in Turkish law, lawsuits to be filed for the relevant parties to regain their inheritance rights are not subject to statute of limitations or limitation periods. The competent court in the case in question is the Civil Court of First Instance, if the case is about the immovable property in question, it is the court where the immovable property is located, and if it concerns a property other than the immovable property, the court of the deceased's last residence.