22 CFR § 50.40 - Certification of loss of U.S. nationality.
(a) Administrative presumption. In adjudicating potentially expatriating acts pursuant to INA 349(a), the Department has adopted an administrative presumption regarding certain acts and the intent to commit them. U.S. citizens who naturalize in a foreign country; take a routine oath of allegiance; or accept non-policy level employment with a foreign government need not submit evidence of intent to retain U.S. nationality. In these three classes of cases, intent to retain U.S. citizenship will be presumed. A person who affirmatively asserts to a consular officer, after he or she has committed a potentially expatriating act, that it was his or her intent to relinquish U.S. citizenship will lose his or her U.S. citizenship. In other loss of nationality cases, the consular officer will ascertain whether or not there is evidence of intent to relinquish U.S. nationality.
(b) Whenever a person admits that he or she had the intent to relinquish citizenship by the voluntary and intentional performance of one of the acts specified in Section 349(a) of the Immigration and Nationality Act, and the person consents to the execution of an affidavit to that effect, the diplomatic or consular officer shall attach such affidavit to the certificate of loss of nationality.
(c) Whenever a diplomatic or consular officer has reason to believe that a person, while in a foreign country, has lost his U.S. nationality under any provision of chapter 3 of title III of the Immigration and Nationality Act of 1952, or under any provision of chapter IV of the Nationality Act of 1940, as amended, he shall prepare a certificate of loss of nationality containing the facts upon which such belief is based and shall forward the certificate to the Department.
(d) If the diplomatic or consular officer determines that any document containing information relevant to the statements in the certificate of loss of nationality should not be attached to the certificate, the person may summarize the pertinent information in the appropriate section of the certificate and send the documents together with the certificate to the Department.
(e) If the certificate of loss of nationality is approved by the Department, a copy shall be forwarded to the Immigration and Naturalization Service, Department of Justice. The diplomatic or consular office in which the certificate was prepared shall then forward a copy of the certificate to the person to whom it relates or his representative.