Mass. Gen. Laws ch. 156B, § 88

The corporation taking such action, or in the case of a merger or consolidation the surviving or resulting corporation, shall, within ten days after the date on which such corporate action became effective, notify each stockholder who filed a written objection meeting the requirements of section eighty-six and whose shares were not voted in favor of the approval of such action, that the action approved at the meeting of the corporation of which he is a stockholder has become effective. The giving of such notice shall not be deemed to create any rights in any stockholder receiving the same to demand payment for his stock. The notice shall be sent by registered or certified mail, addressed to the stockholder at his last known address as it appears in the records of the corporation.