This paper deals with the concept of public policy as a limitation to the application of Foreign law in the Private International Law. Initially I will deal with the concept of foreign law and then after I will do a short focus on the enforcement of foreign laws in context to the Indian laws. In later part I will touch a little bit about all the four exclusion of application of foreign law and those are public policy, Penal laws, Revenue laws and Mandatory rules and then elaborate the concept of public policy exception mainly in context of America that how in many cases the public policy can be easily accessible as exception or in many different cases the concept of public policy is not accepted by thr Honourable Courts in against the enforcement of foreign law. But before going to this aspect, this paper deals with the origin and historical background of public policy and relation with the private international law. Lastly I will conclude the topic with my opinion and suggestions in enforcement of the foreign law while keep an eye on the public policy exception.