Results: [Abstract = "The article concerns the traditional institution of instruction in testament in accordance with Polish law. The Author presented aforementioned issue in connection with selected legal systems of postsoviet area. In particual the author analyzed the issue of the character of relationship, which is created by establishing the instruction in testament according to Polish law and Ukrainian, Russian, Moldavian and Kazakh. The Author also considered the possibility of pursuing instruction before a court and enumerated persons that would be authorised to bring that kind of action. As a result Author formulated the conclusion that establishing the instruction in testament creates obligation relationship sui generis"](1 obiekt)