18.1. The Petition in any disciplinary proceeding shall be served on the respondent attorney by personal service by any person authorized to do so pursuant to the Tennessee Rules of Civil Procedure, or by any form of United States mail providing delivery confirmation, at the primary or preferred address shown in the most recent registration statement filed by the respondent attorney pursuant to Section 10.1 or at the respondent attorney's other last known address. If such service is not successfully completed, the Board shall undertake additional reasonable steps to obtain service, including but not limited to, personal service or service by mail at such alternative addresses as the Board may identify, or service by email at the email address shown in the most recent registration statement filed by the respondent attorney pursuant to Section 10.1 or such other email address as the Board may identify.18.2. Service of any other papers or notices required by this Rule shall, unless otherwise provided by this Rule, be made in accordance with Rule 5.02 of the Tennessee Rules of Civil Procedure.