Mons
Administration communale de Mons – Population, État civil et Étrangers
Rue Buisseret 2, 7000 Mons
Declare your departure one or two days before you leave, not earlier, because deregistration takes effect straight away.
For the email declaration provide the names and national-register numbers of the departing household members, full foreign address and both sides of your identity card. At the counter attend personally with your identity document and foreign address. The fee is €5 per household and processing is immediate; coordinate the date carefully because it changes your registration.