This work presents two legal institutes of mandatory relationships, the contract of lifelong and until-death sustenance. Contracts are viewed through legal and sociological aspects. The aim of the work is to show the risks and legal framework for the abuse of sustenance contracts. This work explores and analyzes the reasons and consequences of the impact of sustenance contracts on older individuals. The content of the work is divided into several sections. The first part introduces us to the theme of the work through theory (definitions of contracts, characteristics, history, principles of application, conclusion, and termination of contracts). The second part shows the importance of judicial practice, and examples of court judgments related to lifelong and until-death sustenance contracts. The final part of the work deals with the research and analysis of the impact of sustenance contracts on older individuals who often enter into contracts to receive the necessary care in exchange for their property. Statistical data, reports on the condition of homes for the elderly, and the number of concluded contracts in the Republic of Croatia are presented. The aim was to present appeals from pensioner associations and the ombudsman regarding the legal and sociological issues of these two contracts, and the amendments to the law on mandatory relations and the Law on Civil Procedure. At the very end, the project „It is important to know at 65“ is presented.