Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 90, § 7R 1/2

No seller, or an agent or employee of a seller, of motor vehicles shall place on a motor vehicle an insignia, logo or other plate that advertises the name of the seller without first having obtained the written consent of the buyer of such motor vehicle. Such seller must provide a buyer with a written consent form at the time of the purchase of the motor vehicle. The original of such written consent form shall be retained by the seller and a copy retained by the buyer. Any such seller's failure to obtain written consent from the buyer shall enable the buyer to request that the seller remove any insignia, logo or plate and make all repairs necessary to restore the motor vehicle to its original condition. Each seller shall post in a conspicuous place, a notice explaining the buyer's rights under this section.

Any violation of this section shall be punishable by a fine of not less than two hundred dollars.