This thesis deals with bank guarantees, an instrument widely used especially in the field of international trade. The aim of this thesis is to characterize bank guarantees and their application in commercial relations. In relation with the growing use of bank guarantees in international business, the customary treatment of this challenging banking instrument will be analyzed and compared in different regions of the world -- i.e. Turkey, Syria, Iran, countries in the Organization for the Cooperation Council of Arab Gulf Countries and the Organization for the Harmonization of Business Law in Africa, - with the international standards of the International Chamber of Commerce. This thesis may be helpful for understanding demand guarantees and, due to the lack of comprehensive information, it could assist companies that trade in the above areas and are required to issue a guarantee to their customers
