International Arbitration has distinguished itself as a method for dispute resolution that pleases both common and civil law practitioners. It, however, is not free of criticism, especially when fact-finding and evidentiary issues are at play. Perhaps because fact-finding is very closely linked to the culture in which they lie, perhaps because of the lack of a clear evidentiary rules governing international arbitration, a theory of evidence in international arbitration is still far fetched. Through the analysis of the distinctions between dispute resolution systems and the search for truth paradigm, this paper aims to develop and present an outline for the development of a theory of evidence in international arbitration.