The Swiss authorities online
To find out who the holder of a certain number plate is, contact the road traffic office that issued the number plate.
Information can be provided about all number plates currently on the road (owner’s name and address).
No information is provided about the holders of deposited or expired number plates or holders who have asked for their details not to be disclosed. Many cantons keep a vehicle index in book form, but some also provide information by SMS and publish holder data on the internet.
You must inform the road traffic office if you do not want your details to be disclosed to private individuals and organisations. In some cantons you can fill out or download a form online. For more information, contact your canton’s road traffic office.
You can only obtain access to withheld vehicle owner data if you can prove that you need the owner’s details in order to exercise your rights.