Mass. Gen. Laws ch. 159B § 16B
Every motor carrier engaged in the transportation of household goods between points within the commonwealth including a carrier providing a service incidental to or part of such intrastate transportation, shall include, and shall require each of its agents to include, in every advertisement as defined therein, the name or trade name of the motor carrier under whose operating authority the advertised service will originate and the certificate number assigned to such operating authority by the department.
Such certificate number shall be in the following form in every advertisement: "MDPU NO.".
As used in this section, "advertisement" shall mean any written or printed communication to the public, in connection with an offer or sale of any intrastate transportation service, but not including the name, address and telephone number of such carrier.
Mass. Gen. Laws ch. 159B, § 16B