Massachusetts General Laws Part III. Courts, Judicial Officers and Proceedings in Civil Cases (Ch. 211-262) Ch. 223A, § 10

(1) On reasonable notice in writing to all parties, setting forth the time and place for taking the deposition, the name and address of each person to be examined, if known, and if not known, a general description sufficient to identify him or the particular class or group to which he belongs and the name or descriptive title of the person before whom the deposition will be taken. The deposition may be taken before a person authorized to administer oaths in the place in which the deposition is taken by the law thereof or by the law of this commonwealth or the United States.

(2) Before a person commissioned by the court. The person so commissioned shall have the power by virtue of his commission to administer any necessary oath.

(3) Pursuant to a letter rogatory issued by the court. A letter rogatory may be addressed “To the Appropriate Authority in (here name the state or country).”

(4) In any manner before any person, at any time or place, or upon any notice stipulated by the parties. A person designated by the stipulation shall have the power by virtue of his designation to administer any necessary oath.