Patent ID: 8250366

Claim:
A method of automatically displaying electronic documents on a vehicle display screen, comprising: transferring an encrypted digital certificate to a control module in a vehicle, the vehicle including a display screen embedded in a window of the vehicle in a manner visible from outside the vehicle, wherein the control module is coupled to the display screen, wherein the encrypted digital certificate is for a vehicle plate number for the vehicle and for the display screen; storing the digital certificate in a memory unit of the control module; and automatically displaying information on the display screen by: retrieving the digital certificate from the memory unit of the control module; and upon validating the digital certificate in the control module, displaying said information associated with the digital certificate on the display screen, wherein the information includes an electronic document that indicates at least one of compliance with a local law, valid insurance, validation of payment of taxes associated with the vehicle, and a parking receipt for parking the vehicle, wherein the display screen comprises at least one button, manipulable by a user outside of said vehicle, to select a display mode of said display screen.