An agreement shall be binding upon the parties, and each party is obliged to be responsible for what is stated in the agreement. This research focuses on the legal perspective of a lease agreement made before a notary public and its relation to the decision of Supreme Court Justice. The study uses normative, philosophical, juridical analysis; in addition, it is a qualitative, comparative research. During the study, a library research is conducted and legal materials are analyzed qualitatively using a case approach. The research leads to a conclusion that, first, a lease agreement made before a notary public is legal and authentic, and second, the decision of Supreme Court strengthens the lease agreement made before a notary public, and the Notary Deed is validated and inviolable.