Payment of the motor vehicle excise is due 30 days from the date the excise bill is issued (not mailed, as is popularly believed). According to Chapter 60A, Section 2 of the Massachusetts General Laws, "Failure to receive notice shall not affect the validity of the excise". A person who does not receive a bill is still liable for the excise plus any interest charges accrued. Therefore, it is important to keep the Registry, local assessors, and the post office informed of a current name and address so that excise bills can be delivered promptly. All owners of motor vehicles must pay an excise tax; therefore, it is the responsibility of the owner to contact the local assessor if he/she has not received a bill.