The formation and development of human society, the deepening, expansion and complication of economic, economic and interpersonal relations between interacting subjects, as well as a high degree of integration and convergence of modern political, economic and legal systems of various states inevitably entail the formulation of significant scientific problems and challenges for researchers in a wide variety of fields. In this sense, the doctrine and practical implementation of the branch of civil law are no exception: the rapidly changing conditions of economic activity and trade and economic turnover naturally force the legislator and the scientific community to search for new, more modern and relevant instruments of legal regulation of a wide range of civil legal relations between subjects that in essence, they form the economic turnover within a particular society and state. This trend, with varying degrees of intensity, affects all sub-sectors and institutions of civil law, including ways to ensure civil law obligations: undoubtedly, today there are many ways for development. Ensuring the proper performance of civil obligations by the subjects of civil law is one of the most important and, as a result, controversial, problematic issues both in domestic and foreign civil law doctrine and in extensive law enforcement practice. In this regard, of central importance is the scientific consideration and study of specific ways to ensure the fulfillment of obligations, many of which are gradually being legally enshrined in the legislation of the Russian Federation. At the same time, due to the lack of real practical experience, as well as the insufficiency of doctrinal sources, the essence of many of them, as well as the relevance and necessity of their application, causes serious disagreement among the scientific and professional legal community. One of these institutions at this stage is the institute of astrent. The article is devoted to the consideration of some problematic aspects of determining the theoretical essence of astrent, which may affect subsequent clarifications or changes in the text of the relevant regulatory legal acts of the Russian Federation. The aim of the work is an attempt to determine the theoretical essence of the institute of astrent in connection with the dual nature of its most significant legal features.