It is often thought that appropriation art doesn’t give rise to its traditional concept and place. Because there are secondary works in the world of visual arts that are taken from the original works. From a legal point of view despite their uniqueness, definite and certain material existence of these works, the situa­tion of the author is not very clear. “How can be explained the authorship relations be­tween the artist and his work in a work that a part of it (sometimes the whole work) has appropriated from another artist?” It is assumed that in all appropriation works the viewer and author are aware about the presence of the first creator in that art­work. This study is descriptive-compar­ative and interdisciplinary analysis. The research data are taken from the fields of contemporary arts, structuralism, intertex­tuality, and intellectual rights, and have been extracted and collected in the form of libraries and documents, and through the tools of taking notes and observing relevant sources and references. In this regard, exceptions of international legal systems and Intellectual property rights in Iran. At the end, some suggestions includ­ing preparing an art certificate has made to evaluate these types of works.