This is one of the kind of works that examines the issue of legalizing the legitimate force of judicial decisions in the first half of the 19th century. The article analyzes the content of the legal institution of the legitimate force of a court decision from the moment of its emergence to the revolutionary legislation, its theoretical and practical application. Consideration of the main methods of objectivism and historicism in the context of the formation of the legal institution of legalizing the legitimate force of a judicial decision in the system of the rule of law. The Creator comes to conclusions. The legislation of the Russian Empire did not have a clear enough formula for legalizing the legitimate force of the decision, but it was allowed and applied as the basis for the subsequent judicial reform, on the basis of the Statute of criminal and civil proceedings, where it was necessary to establish all the circumstances that serve as the basis for making a legitimate decision. In theory, different opinions were expressed about the significance of this legal aspect for real reality. Assumption was not considered one of the main procedural principles. The main conclusions made predetermined the modern practice of state activity, which later formed the basis of the future judicial and legal policy of the state.