Article R531-8 of the French Code governing the entry and residence of foreign nationals and the right of asylum
All correspondence sent by post to asylum seekers is sent to the address at which they have elected domicile pursuant to article L. 551-7.Asylum seekers with a stable address are required, in the event of a change of address, to inform the French Office for Immigration and Integration without delay. Failing this, all correspondence sent to the last known address is deemed to have been notified to the addressee.