Are you requiring your licence plate number for booking a campsite or ferry? In this case, simply enter "Rental Car". This is the easiest and best option for you, since your vehicle might be changed short-term due to unforseen circumstances like an accident.
For more information about ferry bookings take a look here: What information is required for ferry bookings?
Would you like to order an environmental badge in advance? We will only provide you with the registration number and the required documents as late as possible, as otherwise there is a high risk of a vehicle swap. Please contact us within the deadline stated in the relevant country article via our Contact section.
Please note: This does not guarantee that you will receive this exact vehicle, as last-minute vehicle changes (such as in the event of an accident) may still occur!
Looking for more information on vignettes and stickers? Then take a look here: Tolls and vignettes