The aim of the article is first of all an attempt to organize the ways of understanding the “form (of conventional actions in law)” and the contexts of the use of this term in detailed legal sciences. The author also considers the issue of performing conventional actions in law by non-linguistic actions and omissions, as well as the issue of significance of form ecognition in the context of identifying conventional actions in law. The results of the research presented in the paper (apart from their cognitive value) are to serve the development of the theoretical concept of conventional actions in law and, as far as possible, to put in order the dogmatic-legal discussion concerning the title issue.