Mass. Gen. Laws ch. 158, § 32

A corporation shall not begin business until the whole amount of its capital stock has been paid in and a certificate of that fact, and of the manner in which the same has been paid in and, at the time of making the certificate, been invested or voted by the corporation to be invested, signed and sworn to by the president, treasurer and a majority of the directors, has been filed in the office of the state secretary.