OBLIGATION OF THE COMMUNICATION OF FOREIGN GUESTS
We are required by law to identify foreign citizens by SEF (Serviço de Estrangeiros e Fronteiras or the Immigration and Borders Service).
Since 2015 Portugal has more strictly enforced a longstanding law requiring anyone providing paid holiday accommodation to record the entry, exit, and identification details of all nonPortuguese nationals who use that accommodation. This law has been brought into force in Portugal and most other EU countries at some point since the gradual implementation of the 1990 Schengen Agreement that aims to stop human trafficking and other illegal practices. In this case, it is specifically Article 45 of the Schengen Agreement
and the recent Alojamento Local law in Portugal that has brought this rule into sharper focus.
We will ask for it, please facilitate your identification card when checking in.
More details at SEF page (English version):