37 CFR § 2.24
Designation and revocation of domestic representative by foreign applicant
November 5, 2020
(a) An applicant or registrant that is not domiciled in the United States may designate a domestic representative (i.e., a person residing in the United States on whom notices or process in proceedings affecting the mark may be served).
(b) The designation, or a request to change or revoke a designation, must set forth the name, email address, and postal address of the domestic representative and be signed pursuant to §2.193(e)(8).
(c) The mere designation of a domestic representative does not authorize the person designated to represent the applicant or registrant.
[84 FR 37094, July 31, 2019]