A notice, order, decision, or pleading required by this chapter to be served on a respondent shall be served on the respondent or representative designated by the respondent or by law to receive service of papers. If a respondent has appeared through counsel, service shall be made upon the counsel of record.
Service on a respondent shall be directed to the last known address of the respondent on file with the Director and shall be completed by one of the following methods:
Proof of service, stating the name and address of the person on whom service is made and the manner and date of service, shall be shown by one of the following methods:
If service is by personal delivery, it shall be deemed to have been served on the date and at the time shown certificate of service indicating that the document was accepted, refused.
If service is by certified mail, it shall be deemed to have been served on the date and at the time shown on the return receipt that the document was accepted, refused, or returned unclaimed.
If service is pursuant to an order of the Director, it shall be deemed to have been served on a date and at a time as provided in that order.
D.C. Mun. Regs. tit. 17, r. 17-2934