CARS.COM — In the 19 states that require vehicles to display only one license plate at the rear, most folks think that is how life should be. In the other 31 states and Washington, D.C., being ...

Being able to customize your license plate to match your car is a terrific idea, especially when your state has such a lousy standard license plate. The trouble is, they are illegal.

You're allowed to create personalized license plates for your car. Maybe you shouldn't be, if these amusing (slightly inappropriate) vanity plate ideas are anything to go by.

For example, Pennsylvania requires that your vehicle must already have a valid, current license plate – unless, of course, it’s new. If you just purchased your car, it must be titled and ...

Q: I have a personalized plate on the back of my Tesla, but haven’t mounted the front one yet. I like the look of the car without it and so far just haven’t bothered to install it.

FILE - The Model S sedan at the new Tesla gallery on Greenwich Avenue in Greenwich, Conn. Wednesday, Sept. 28, 2016 is seen with a front license plate holder.