Special appointments to serve process shall be made freely when

substantial savings in travel fees will result. Service by publication shall be made by the register on behalf of the petitioner unless otherwise ordered by the court. When service by any method is to be made by the register, the petition shall contain a written request for such service, accompanied by a tender of fees and a list of persons to be served and their addresses if known. (2) Civil Proceedings. In civil proceedings, service shall be made as provided in Rule 4(c) of the Maine Rules of Civil Procedure. (d) Service of Notice and Summons. (1) Probate Proceedings. In probate proceedings, the notice and, where appropriate, the petition shall be served together by one of the following methods: (A) In informal probate proceedings, the notice shall be served upon all persons specified in sections 3-306 and 3-310 of the Probate Code by ordinary mail addressed to the recipient at the post office address given in the recipient’s demand for notice, if any, or at the recipient’s office or place of residence. Service by mail is complete upon mailing. Service shall also be made by publication as provided in subdivision (e) of this rule upon any of the specified persons whose address or present whereabouts is unknown and cannot be ascertained by due diligence or, on request of the applicant, upon all unknown persons. (B) In formal probate proceedings, except as otherwise provided by statute, the notice and petition shall be served by certified mail, with restricted delivery and return receipt requested, upon all persons upon whom service is required by statute, including any person who has made a demand for notice as provided in