Rule 12. Filing and service.

(a) Filing. Papers required or permitted to be filed must be placed in the custody of the clerk within the time fixed for filing. Filing may be accomplished by mail addressed to the clerk, but filing shall not be timely unless the papers are actually received within the time fixed for filing.

(b) Service of all papers required. Copies of all papers, including any transcript, filed by any party and not required by these rules to be served by the clerk shall, at or before the time of filing, be served by the party or person acting for such party on all other parties to the appeal. Service on a party represented by counsel shall be made on counsel.

(c) Manner of service. Service may be personal or by mail. Personal service includes delivery of the copy to a clerk or other responsible person at the office of counsel. Service by mail is complete on mailing.

(d) Proof of service. Papers presented for filing shall contain acknowledgment of service by the person served or proof of service in the form of a statement of the date and manner of service and of the names of the persons served, certified by the person who made service. Proof of service may appear on or be affixed to the papers filed. The clerk may permit papers to be filed without acknowledgment of proof of service but shall require such to be filed promptly thereafter.

(e) Number of copies to be filed. A signed original shall be filed with the clerk of the district court unless otherwise ordered by the court.