Just a couple of thoughts: this is possible because the key they give to you is associated to the owner's profile in the car... They should keep the owner's profile (secured by pin) connected to a different nfc key (they keep safe) and give to you the key associated to a simple "user profile". This way you are still able to add the car to your app or but they can remove and create again a new profile for each customer everytime they assign the car to a new person. This way the car should disappear to your app. Doesn't it? Maybe Google can provide a fleet management app for large rentals... This can simplify a lot the car management (also lock the cars remotely if stolen, find my cars, monitor daily kilometers, recharges, etc.)
Just a couple of thoughts: this is possible because the key they give to you is associated to the owner's profile in the car... They should keep the owner's profile (secured by pin) connected to a different nfc key (they keep safe) and give to you the key associated to a simple "user profile". This way you are still able to add the car to your app or but they can remove and create again a new profile for each customer everytime they assign the car to a new person. This way the car should disappear to your app. Doesn't it?
Maybe Google can provide a fleet management app for large rentals... This can simplify a lot the car management (also lock the cars remotely if stolen, find my cars, monitor daily kilometers, recharges, etc.)
That makes sense to me. You (as the owner) could also use thsi feature to track anyone you lend the car to.