When you provide your licence plate, we match it back to your VIN which gives us information on your vehicle's year, make, model, and trim. Those four pieces of information and your VIN are the only things we have access to when you provide your plate number - there is no personal or confidential information included. Your VIN is used to provide accurate recall information while the rest of the information allows us to book services at your request and provide the estimated trade-in value of your vehicle.
If you are not comfortable providing your plate information, you can add your vehicle by year, make, and model but the information you receive will be much more limited which is why we recommend the licence plate addition.