As regards the supporting document provided for in Article R. 211-15, the following must be indicated under the vehicle’s characteristics:
1° In all cases, the type and make of the vehicle ;
2° In the case of a vehicle subject to registration, its registration number;
3° In the case of a vehicle not subject to registration, the engine number, if applicable.
At least one of the characteristics listed above must be entered on the supporting document by the insurance company issuing it. To be valid, the supporting document must, where applicable, be completed by the user of the vehicle before any use.