The question around foreigners and their obligation to respect and fulfil the national - or civil - norms of the territory where they are; has become due the migration and multicultural movements once again a key one. Addressed by a multitude of authors along the centuries, the question has been answered based on the different placements around juridical and political concepts like citizenship, sovereignty, authority or law. In this investigation, the doctrinal development carried out around the obligatory nature of the (...) civil norm for foreigners in Spanish scholasticism is going to be considered. Specifically, due to its thoroughness and depth, the doctrine done by Francisco Suarez is going to be critically analysed. Once the answer given in our author's doctrine to the question posed has been established, we will consider the possible influences in the Anglo-Saxon sphere. (shrink)