The problem of recognition and enforcement of foreign judgments is closely linked to
Private International Law. Beginning with the principle of territorial sovereignty that prevents
foreign judgments from having any effect in any of the other countries, however, we have found
that various doctrines have been propounded to explain why a country should show respect to
the recognition and enforcement of foreign judgments. The principal doctrines have been those
based on comity, reciprocity, obligation and acquired rights or vested rights.