K. Kuhn, Arthur Keywords: Effets négociables | Unification of law | Mots clefs: Titres négociables | Unification du droit | ABSTRACT After a general presentation of bills of exchange in international trade, Arthur Kuhn presents the main problems raised in international trade by the conflict of laws related to bills of exchange. He then studies the Hague Convention on Bills of Exchange and Promissory Notes. The author then focuses on the positive provisions of the Uniform Rules, then to the draft elaborated at the Ha…