Massachusetts Rules of Professional Conduct Rule 7.5: Firm Names and Letterheads
(a) A lawyer shall not use a firm name, letterhead, or other professional designation that violates Rule 7.1. A trade name may be used by a lawyer in private practice if it does not imply a connection with a government agency or with a public or charitable legal services organization and is not otherwise in violation of Rule 7.1.
(b) A law firm with offices in more than one jurisdiction may use the same name in each jurisdiction, but identification of the lawyers in an office of the firm shall indicate the jurisdictional limitations on those not licensed to practice in the jurisdiction where the office is located.
(c) The name of a lawyer holding a public office shall not be used in the name of a law firm, or in communications on its behalf, during any substantial period in which the lawyer is not actively and regularly practicing with the firm.
(d) Lawyers may state or imply that they practice in a partnership or other organization only when that is the fact.
Adopted June 9, 1997, effective January 1, 1998.
 A firm may be designated by the names of all or some of its members, by the names of deceased or retired members where there has been a continuing succession in the firm's identity or by a trade name such as the "ABC Legal Clinic." Use of such names in law practice is acceptable so long as it is not misleading. If a private firm uses a trade name that includes a geographical name such as "Springfield Legal Clinic," an express disclaimer that it is a public legal aid agency may be required to avoid a misleading implication. It may be observed that any firm name including the name of a deceased or retired partner is, strictly speaking, a trade name. The use of such names to designate law firms has proven a useful means of identification. However, it is misleading to use the name of a lawyer not associated with the firm or a predecessor of the firm.
 With regard to paragraph (d), lawyers who are not in fact partners, such as those who are only sharing office facilities, may not denominate themselves as, for example, "Smith and Jones," or "Smith and Jones, A Professional Association," for those titles, in the absence of an effective disclaimer of joint responsibility, suggest partnership in the practice of law. Likewise, the use of the term "associates" by a group of lawyers implies practice in either a partnership or sole proprietorship form and may not be used by a group in which the individual members disclaim the joint or vicarious responsibility inherent in such forms of business in the absence of an effective disclaimer of such responsibility.
 S.J.C. Rule 3:06 imposes further restrictions on trade names for firms that are professional corporations, limited liability companies or limited liability partnerships.
Corresponding ABA Model Rule. Identical to Model Rule 7.5.
Corresponding Former Massachusetts Rule. DR 2-102.