The theme of this final paper is "The relation between cession and subrogation. Cession and subrogation in legal theory are classified under the institute of change in the obligatory relationship, namely, the change of the subjects. It is important to emphasize that the change in the obligatory relationship may appear on the side of the debtors or on the side of the creditors. Cession and subrogation are the changes that occur on the creditor side. This paper will define such changes in the legal relationship with special attention to the cession and subrogation and set the analysis through real examples of contracts. Actual contracts received from a lawyer's office will be analyzed. The notion of obligatory law right and its essential characteristics, as well as the subjects of the obligatory law, as such, will form the basis of this work. The aim of this paper is to analyze the relationship between cession and subrogation, more precisely the differences and similarities between the already mentioned institutes of obligatory law.