The principle of good faith plays an important role in the legal order of any state. Its content and practical implementation may raise questions, but its importance for ensuring fairness in legal relations is undeniable. Despite the complexity and abstractness of the principle of good faith, its practical significance is great: a party that commits dishonesty in its actions may be denied, in whole or in part, the protection of its rights, which will ensure, among other things, the protection of the interests of the bona fide party. It is extremely important to study foreign experience in applying the principle of good faith, both in order to identify the most effective judicial practices, and in order to find the optimal legal tools that could be used in the law enforcement practice of the Russian Federation.

The purpose of the study is to form a scientific understanding of the application of the principle of integrity, taking into account Russian practice and the practice of foreign countries.

The research was carried out on the basis of general scientific interdisciplinary and specific methods (formal legal, comparative legal, etc.).

Conclusions. The open nature of the principle of good faith allows it to be applied to a variety of practical situations. A comparative analysis of judicial practice on assessing the good faith of refusals to participate in group proceedings led to the conclusion that the application of the principle of good faith should not be based on firm imperative principles, as this can lead to adverse consequences. When assessing the actions of the parties, courts should proceed not from the behavior expected of any participant in civil transactions, but from the legitimate expectations of the parties to a particular agreement; A correct assessment of the behavior of the parties is facilitated by an analysis of the interests of the disputing persons, taking into account the specific circumstances of the case.