Massachusetts General Laws Chapter 90 Section 23 makes it a crime to intentionally attach the wrong license plates. Three elements must be proved beyond a reasonable doubt to convict someone of this crime:

1. That you attached the license plate in question to a motor vehicle or that you permitted someone else to attach that plate;
2. That the license plate you attached was not assigned to the motor vehicle to which you had it attached;
3. That you committed this act with the intent to conceal the identity of that motor vehicle.

Penalty: $100 fine and/or up t 10 days in jail