Absolutely not!!! This should be pretty obvious, but here's the law: https://www.dmv.ca.gov/pubs/vctop/d03/vc5201.htm https://www.dmv.ca.gov/pubs/vctop/d03/vc5

Absolutely not!!! This should be pretty obvious, but here's the law: https://www.dmv.ca.gov/pubs/vctop/d03/vc5201.htm https://www.dmv.ca.gov/pubs/vctop/d03/vc5201.htm 5201. (a) License plates shall at all times be securely fastened to the vehicle for which they are issued so as to prevent the plates from swinging, shall be mounted in a position so as to be clearly visible, and so that the characters are upright and display from left to right, and shall be maintained in a condition so as to be clearly legible. The rear license plate shall be mounted not less than 12 inches nor more than 60 inches from the ground, and the front license plate shall be mounted not more than 60 inches from the ground... and (c) A casing, shield, frame, border, product, or other device that obstructs or impairs the reading or recognition of a license plate by an electronic device operated by state or local law enforcement, an electronic device operated in connection with a toll road, high-occupancy toll lane, toll bridge, or other toll facility, or a remote emission sensing device, as specified in Sections 44081 and 44081.6 of the Health and Safety Code, shall not be installed on, or affixed to, a vehicle.