Yuce, Melek BilginTurker, Guray2026-02-152026-02-1520252636-77342667-697410.26650/mecmua.2025.83.4.0008https://doi.org/10.26650/mecmua.2025.83.4.0008https://hdl.handle.net/20.500.14517/8758The assignment of claim agreement regulated under Article 183 et seq. of the Turkish Code of Obligations is a disposition agreement between the holder of the right of claim and a third party who wishes to assign the right of claim and which transfers the right of claim to the assets of the third party without the consent of the debtor of this claim. The three cornered relationship created by the assignment of the claim brings with it complex and controversial problems. The person who wants to transfer the rent may transfer it in order to gain the right to receive the claim, as well as in order to fulfil the obligation. One of these complex and controversial problems is the assignment of rent for the purpose of fulfillment. In practice, it is observed that especially bank debtors transfer their lease receivables arising from the lease agreements regarding the real properties they own in order to pay their debts arising from loan agreements. In this study, onerous assignment of claim based on the reason for fulfillment and the two types of assignment of claim based on the reason for fulfillment, namely assignment in lieu of fulfillment and assignment for fulfillment, are discussed. In our study, firstly, the concepts of assignment of claim, assignment instead of fulfillment and assignment for fulfillment are emphasised. While doing so, the validity of the assignment of claim agreement has been examined, especially in terms of the power of disposition of real and legal persons, and the relatively new regulations that have entered into force in terms ofsports clubs have also been pointed out. In the following parts of our study, considering the possibility of disputes that may arise from transfers for the purpose of fulfilment, whether the right to terminate the lease agreement, the right to file a lawsuit for the determination of the rental price and the right to file a lawsuit for the adaptation of the lease agreement will pass to the transferee of the right of claim is examined on the axis of the concepts of lease agreement, formative rights and formative lawsuits.trinfo:eu-repo/semantics/openAccessAssignment of ClaimLease AgreementAssignment of Instead of FulfillmentAssignment for FulfillmentFormative RightFormative LawsuitTermination RightDetermination of Rental PriceAdaptation of Lease AgreementArticle