How can I stop fines being sent to old address?

Last year, I received a speeding fine and it was sent to my previous address. Since then, I’ve moved house and have been trying to find out how to update my details. D.B.

To avoid having a fine sent to the wrong address you must make sure that if you move house you update your car registration document (certificat d’immatriculation, known informally as a carte grise).
You are supposed to do this within a month of moving house, but if you have not done so it would be better late than never as you may be fined if the mistake is found during a police check.
If your number plate is still of the old-fashioned kind (in the format 1234-AB-56), then you will be issued with a new number and will need to change your plates. For the first three changes of address you
can simply be sent a sticker to place over the address. In most cases you can order this online, but in some areas you need to go to the prefecture or apply by post. For more information contact your prefecture or see here (and put in your postcode): service -public.fr/particuliers/vosdroits/F12118 From a fourth change of address you need a new carte grise and need to return the old one to the prefecture