12 C.F.R. § 1081.113 – Service of papers.

(a) When required. In every adjudication proceeding, each paper required to be filed by § 1081.111 must be served upon each party in the proceeding in accordance with the provisions of this section; provided, however, that absent an order to the contrary, no service is required for motions which are to be heard ex parte.
(b) Upon a person represented by counsel. Whenever service is required to be made upon a person represented by counsel who has filed a notice of appearance pursuant to § 1081.107(a)(3), service shall be made pursuant to paragraph (c) of this section upon counsel, unless service upon the person represented is ordered by the Director or the hearing officer, as appropriate.
(c) Method of service. Except as provided in paragraph (d) of this section or as otherwise ordered by the hearing officer or the Director, service must be made by delivering a copy of the filing by one of the following methods:
1. (1) Transmitting the papers by electronic transmission where the persons so serving each other have consented to service by specified electronic transmission and provided the Bureau and the parties with notice of the means for service by electronic transmission (e.g., email address or facsimile number);
2. (2) Handing a copy to the person required to be served; or leaving a copy at the person's office with a clerk or other person in charge thereof, or, if there is no one in charge, leaving it in a conspicuous place therein; or, if the office is closed or the person to be served has no office, leaving it at the person's dwelling or usual place of abode with some person of suitable age and discretion then residing therein;
3. (3) Mailing the papers through the U.S. Postal Service by First Cass Mail, Registered Mail, Certified Mail or Express Mail delivery addressed to the person; or
4. (4) Sending the papers through a third-party commercial courier service or express delivery service.
(d) Service of certain papers by the Enforcement Division or the Office of Administrative Adjudication—(1) Service of a notice of charges by the Enforcement Division—(i) To individuals. Notice of a proceeding shall be made to an individual by delivering a copy of the notice of charges to the individual or to an agent authorized by appointment or by law to receive such notice. Delivery, for purposes of this paragraph (d)(1)(i), means handing a copy of the notice to the individual; or leaving a copy at the individual's office with a clerk or other person in charge thereof; or leaving a copy at the individual's dwelling house or usual place of abode with some person of suitable age and discretion then residing therein; or sending a copy of the notice addressed to the individual through the U.S. Postal Service by Registered Mail, Certified Mail or Express Mail delivery, or by third-party commercial carrier, for overnight delivery and obtaining a confirmation of receipt.
(ii) To corporations or entities. Notice of a proceeding must be made to a person other than a natural person by delivering a copy of the notice of charges to an officer, managing or general agent, or any other agent authorized by appointment or law to receive such notice, by any method specified in paragraph (d)(1)(i) of this section.
(iii) Upon persons registered with the Bureau. In addition to any other method of service specified in paragraph (d)(1)(i) or (ii) of this section, notice may be made to a person currently registered with the Bureau by sending a copy of the notice of charges addressed to the most recent business address shown on the person's registration form by U.S. Postal Service certified, registered, or Express Mail and obtaining a confirmation of receipt or attempted delivery.
(iv) Upon persons in a foreign country. Notice of a proceeding to a person in a foreign country may be made by any method specified in paragraph (d)(1) of this section, or by any other method reasonably calculated to give notice, provided that the method of service used is not prohibited by the law of the foreign country.
(v) Record of service. The Enforcement Division will maintain and file a record of service of the notice of charges on parties, identifying the party given notice, the method of service, the date of service, the address to which service was made, and the person who made service. If service is made in person, the certificate of service must state, if available, the name of the individual to whom the notice of charges was given. If service is made by U.S. Postal Service Registered Mail, Certified Mail, or Express Mail, the Enforcement Division will maintain the confirmation of receipt or attempted delivery. If service is made to an agent authorized by appointment to receive service, the certificate of service must be accompanied by evidence of the appointment.
(vi) Waiver of service. In lieu of service as set forth in paragraph (d)(1)(i) or (ii) of this section, the party may be provided a copy of the notice of charges by First Class Mail or other reliable means if a waiver of service is obtained from the party and placed in the record.
(2) Service of papers by the Office of Administrative Adjudication. Unless otherwise ordered by the hearing officer or Director, the Office of Administrative Adjudication must serve papers filed by the hearing officer or Director promptly on each party pursuant to any method of service authorized under paragraph (c) or (d)(1) of this section. Unless otherwise ordered by the hearing officer or Director, if a party is represented by counsel who has filed a notice of appearance pursuant to § 1081.107(a)(3), the Office of Administrative Adjudication serves that party by serving its counsel.