Securities on movables are one of the major feature of credit mechanisms. / Under domestic law, this type of guarantee is widely used, specifically in France, Great-Britain and Canada, under different forms. On the other hand, due to legal uncertainties surrounding operations bearing an international character, securities on movables are rarely used in international transactions. / Regrettably, this established fact, particularly illustrated by French law, appears to go against modern tendencies to favour the internationalisation of commercial activities. The analysis of the rules of French private international law in the light of the corresponding rules of English and Canadian law allows us to identify the main obstacles in the international traffic of securities on movables and to propose reforms initiatives. / Consequently, the analysis of several ratified or drafted international conventions which are related to some aspects of securities on movables in an international context can bring suitable solutions to problems raised by the internationalisation of securities. This thesis proposes that these international agreements carrying conflict of law rules or uniform substantive law constitute the most promising means of regulating these mechanisms which are directly connected to modern international financing.

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