Abstract: International relations based on international treaties face the problem of states fulfilling their obligations. Fulfillment of obligations is the foundation of contractual legal relations, which is secured by responsibility of various kinds and types. The stability of international relations is extremely important, first of all, for maintaining peace, which imposes additional moral obligations on states. The principle of good faith in the fulfillment of international obligations covers many aspects of a moral and ethical nature; it is on the principle of good faith that, for the most part, the fulfillment of the terms of international treaties is based. This scientific article provides an analysis of the criteria for assessing the conscientious behavior of an entity in the fulfillment of international obligations, and identifies existing guarantees for the conscientious execution of international treaties.
The study made it possible to determine some aspects of ensuring compliance with the terms of international treaties. The foundation for the fulfillment of international obligations is the principle of good faith, which is one of the guarantees of the implementation of international treaties. Conscientious fulfillment of the obligation is also supported by certain measures, together they ensure the fulfillment of international obligations by states. The principle of fair execution of international treaties is enshrined with an indication of the consequences of non-compliance with it, but clear criteria for assessing the good faith behavior of an entity are not normatively designated, which excludes a formal approach to assessing good faith and thereby is a kind of guarantee of fair execution of international treaties. There are other elements that ensure the conscientious execution of international treaties, these include: the procedure for concluding international treaties, the definition of its conditions, international control and surveillance, the state of the domestic legislation of any state.

Abstract: The study of the problems of international legal responsibility as one of the basic elements of international legal regulation is of particular importance due to the fact that the subjects of international law, taking advantage of the dispositivity and consensual nature of its norms, abuse them in their own interests, often seriously infringing the interests of their international partners. The institution of international legal responsibility is one of the earliest forms of interstate relations that arose long before the formation of public international law as a legal system. The article discusses the forms of compensation for harm in public international law. The property and non-property forms of compensation for harm are highlighted. The key characteristics of international legal responsibility are defined, such as compensation for harm, as the most effective sanction for unlawful actions, and restoration of the violated rights and interests of the victim. The analysis of the order and consequences of the application of forms of international legal responsibility is given. The institute of international legal responsibility is very extensive, we have considered only some of its part concerning the forms of international legal responsibility. Forms of international legal responsibility can be of a property and non-property nature. Property forms of liability include: restitution, compensation, satisfaction. Non-property forms of responsibility include: retorsions and reprisals. As a result of the conducted research, it is concluded that the forms of liability are most effective when they are combined when several property forms of liability (for example, restitution and compensation) are used together with non-property forms of liability. It is noted that non-property forms of liability are the most effective in terms of influencing the reputation of the harm-doer, due to their publicity.