Mass. Gen. Laws ch. 186 § 21
The landlord or lessor of any residential or commercial property, upon the written request of any tenant or lawful occupant, of any code or other law enforcement official or of any official of the municipality in which the property is situated, shall disclose in writing within fifteen days of such request the name of the company insuring the property against loss or damage by fire and the amount of insurance provided by each such company and the name of any person who would receive payment for a loss covered by such insurance. Whoever violates the provisions of this section shall be punished by a fine of not more than five hundred dollars. A waiver of this section in any lease or other rental agreement shall be void and unenforceable.
Mass. Gen. Laws ch. 186, § 21