In France, a fiche S (English: S card) is an indicator used by law enforcement to flag an individual considered to be a serious threat to national security.
[2] Suspects flagged with fiche S have included those who have looked at jihadist websites or met radicals outside mosques, to those considered highly dangerous.
[3] The fiche S alert began in 1969 with the establishment of the national fugitive registry, the "Fichier des personnes recherchées" ("File of Wanted People") or FPR, maintained by the Police Nationale.
[5] It is the highest warning possible without giving cause for arrest (or deportation in case of a foreign national),[4] though it does permit surveillance, including wiretapping and placing GPS-tracking devices on cars.
[1] In 2015, the French Prime Minister Manuel Valls claimed there were 20,000 people in France tagged with a fiche S, including 10,500 suspected of being Islamic radicals.