Principle of mutual recognition of judicial decisions in European Union criminal law

Expansion of criminality particularly because of globalization requires international criminal cooperation more than ever. This is a matter of paramount importance amongst the countries which their borders have been removed due to economic political integration, or even amongst the proximate countries in a geographical region where a particular transnational crime is being always committed. This is because that with expanding criminality beyond national borders, it would not be any more possible for the countries to deal with it by their own. Thus, it is only by reinforcement of cooperation and institution of new mechanism that such criminality could be effectively controlled. This article is to examine European Union criminal law through the integration of the member states countries. This criminal law as a regional criminal law has led to provision of some mechanisms and institutions that one of most important of them is the principle of mutual recognition of decision in criminal matters; This principle has realized for the first time by provision of European Arrest Warrant. Consequently, considering the expansion of criminality beyond national borders, reinforcement of international criminal cooperation is a necessary strategy that should be come into force by some new mechanisms.