Citizenship Services

This page contains information that may be useful for U.S. citizens seeking information on dual nationality, loss of nationality, and military service obligations for dual nationals.

Citizenship services are only available by appointment.  Walk-ins are not permitted.

While recognizing the existence of dual nationality, the U.S. government does not encourage it as a matter of policy because of the problems it may cause.  Dual nationality may hamper efforts by the U.S. government to provide consular protection to individuals overseas, especially when they are in the country of their second nationality.  Claims of other countries upon dual national U.S. citizens may place them in situations in which their obligations to one country conflict with the laws of the other.

Public inquiries about the citizenship laws of other countries should be directed to the embassy or consulate of that country in the United States.  U.S. law and regulations require that U.S. citizens enter and exit the United States on a U.S. passport, with certain limited exceptions.

Please visit for more information on dual nationality.

Renouncing or relinquishing U.S. citizenship is a grave decision, and it should not be taken lightly.  It is a voluntary and irrevocable act.

Those considering this decision should first review the information and resources linked below.  The process of renouncing U.S. citizenship requires two interviews.  The first interview is followed by a period of reflection, after which a second interview can be scheduled.  Given the serious consequences of renunciation, the process cannot be expedited, and all steps are mandatory.  At the second interview, if requirements are met, the renunciant will sign relevant forms and the Consular Officer will administer the Oath of Renunciation.  Please note that a non-refundable processing fee of $2,350 is charged at the second interview.  The Department of State in Washington, D.C. makes the final decision on loss of nationality cases.  It can take several months for the Department to issue its decision and a Certificate of Loss of Nationality.

Due to the global pandemic, the U.S. Embassy conducts the first loss of nationality interview by phone and has very limited availability to accommodate second interviews.  Priority is given to individuals who reside in the Republic of Korea.  If you wish to schedule an appointment, please contact – do not schedule using the online appointment system.

Please see the following links for more information about loss of nationality:

Dual Nationality
Renunciation of U.S. Nationality Abroad
Renunciation of U.S. Citizenship by Persons Claiming Right of Residence in the United States
Advice About Possible Loss of U.S. Nationality and Seeking Public Office in a Foreign State
Advice About Possible Loss of U.S. Nationality and Foreign Military Service
Expatriation Tax Guidance

The U.S. Embassy is not able to provide guidance or answer individual questions regarding the Republic of Korea’s (ROK) laws regarding military service.

For authoritative information, please refer to the Military Manpower Administration website (, English available) or the closest Korean embassy or consulate.  The MMA Overseas Travel Procedure Guidebook also has information for male dual nationals.