Mass. Gen. Laws ch. 90K, § 2
(c) The registered owner of a motor vehicle shall be liable for any fine unless the:
(h)
(2) In the case of a violation involving a motor vehicle registered in the commonwealth, the notice of violation shall be mailed to the address of the registered owner of the motor vehicle as listed in the records of the registrar. If a motor vehicle is registered under the laws of another state or county, the notice of violation shall be mailed to the address of the registered owner as listed in the records of the official in the state or county that has charge of the registration of the motor vehicle. If the address is unavailable, it shall be sufficient for the enforcing authority to mail a notice of violation to the official in the state or county that has charge of the registration of the motor vehicle.
(i)
(2) Not more than 60 days after a camera enforceable violation under this chapter, a registered owner of a motor vehicle may contest responsibility for the violation in writing by mail or online. The registered owner shall provide the enforcing authority with a signed affidavit, in a form approved by the enforcing authority, stating the: