Today, international migration is a phenomenon of globalization and contributes to increasing trade and investment. This accelerating global economic integration influences both legal and unauthorized migration patterns and migration policies. Migration is not new: it has been a feature of human life since ancient times. Migration is a process that consists of a point of origin, transit, and destination; it can have a return phase, and the process can be repeated.1 Migration flows in the twenty-first century are much more complex, and the magnitude, density velocity and ease of travel have greatly increased (Nyberg-Sorensen et al. 2002).