Massachusetts Law About Subpoenas
Massachusetts Rules
MRCP 45: Subpoenas
Forms
Service Providers
While Rule 45 provides that service can be made by "any person who is not a party and is not less than 18 years of age," service can also be made by a Deputy Sheriff or Constable.
Other Web Sources
Your Guide to Subpoenas-What they are, How they can help you, and How to serve them, Mass. Legal Services. A simple guide for those who want to serve a subpoena, includes directions and forms.