Article R312-9 of the French Code governing the entry and residence of foreign nationals and the right of asylum
When a foreign national is authorised to reside in France under cover of a travel document bearing a visa required for stays not exceeding three months, this visa may be revoked by the prefectoral authority in the following cases:1° The foreigner who holds it carries out a gainful activity in France without having been duly authorised to do so;2° There is corroborating evidence leading to the presumption that the foreigner…