Massachusetts Supreme Judicial Court Rule 2:03: Appearances
(Applicable to criminal cases.)
The name, address, and business telephone number of the attorney for every party, or of the party if no attorney appears for him, shall be entered upon the docket as they appear upon the paper or papers constituting the appearance, or some paper transmitted to the clerk therewith. Where no address of the attorney or party, as the case may be, appears upon the docket, notice to such party may be given by posting the same publicly in the clerk's office or in a room, hall or passage adjacent thereto. The clerk upon request shall post the same.
A substitution of attorneys or change of address or telephone number shall be entered by the clerk upon the docket on written request filed in the particular case. The court and the parties, until such substitution or change is entered, and thereafter until the parties have notice thereof, may rely on action by, and notice to, any attorney previously appearing, and on notice at an address previously entered.
Any appearance shall constitute a general appearance unless the purposes thereof are specified in writing.