Legal Certainty in International Law: Concept and Position

Legal certainty is one of the important disciplines in a legal system. Although, the issue of legal certainty is supposed to be a society-specific issue, however, it is challenging and doubtful concept in international law. However, largely, challenges and criticisms in international law due to the existence of legal certainty are remarkable, this does not imply ignoring the legal certainty within the structural dimension of the system. The principal assumption of this article is assuming the international community and to prove the relative "legal certainty " inspired by it in substantive and structural dimensions. In this paper, we try to seek and explain the appropriate terms of legal certainty and then understanding it in international legal system, nature of subordinate and structures and international community as an important issue. In conclusion, it has been shown that UN Charter, Four Geneva Convention and Human rights instrument are indications of existence of legal certainty.