D.C. Mun. Regs. tit. 17, § 2409
2409.1 Notary commissions expire at the end of the five year term or upon resignation of the commission. (See Section 2402 on Reappointment). Notaries who no longer reside in the District or who cease to be employed in a business physically located in the District must resign their commission by notifying ONCA, in writing, at: Secretary of the District of Columbia Attention: Office of Notary Commissions and Authentications, 441 4th Street N.W., Suite 810 South, Washington D.C. 20001. Notification may also be sent by email to: notary@dc.gov.
SOURCE: Final Rulemaking published at 63 DCR 9099 (July 1, 2016).