Transnational organized crimes are those crimes which are committed by international criminals, in a large group or different sub-groups, coordinated across international border. To combat these crimes, UNTOC (The United Nations Convention against Transnational Organized Crime) was introduced in 2000 by the UN which is also known as the Palermo Protocol or Palermo Policy. It came into force in September 2003. Although 20 years has been passed since it came into force, however, the question remains how effective is this protocol to prevent organized crimes. The present study will demonstrate how effective is the policy itself. If it failed what are the reasons behind the failure of the policy. It will also find out what measures should be taken so that the policy can play an effective role to combat those types of crimes.