Rule 19-304.4 Respect for Rights of Third Persons [MARPC 4.4]

(a) In representing a client, an attorney shall not use means that have no substantial purpose other than to embarrass, delay, or burden a third person, or use methods of obtaining evidence that the attorney knows violate the legal rights of such a person.

(b) In communicating with third persons, an attorney representing a client in a matter shall not seek information relating to the matter that the attorney knows or reasonably should know is protected from disclosure by statute or by an established evidentiary privilege, unless the protection has been waived. The attorney who receives information that is protected from disclosure shall (1) terminate the communication immediately and (2) give notice of the disclosure to any tribunal in which the matter is pending and to the person entitled to enforce the protection against disclosure.