File a report with the police. You will receive a certificate of loss or theft. You must send this certificate together with the form 'Application for registration of a vehicle' to the Federal Public Service Mobility and Transport.

In the meantime, you are not allowed to go on public roads without a number plate. After all, the lost or stolen number plate is deleted from the services of the FPS Mobility and Transport. After a few working days you will receive a new registration certificate and a new number plate.

If you have only lost your front number plate (reproduction number plate), you can simply have a copy made at a garage nearby.