Can a naturalized citizen lose citizenship?
U.S. citizenship can be revoked to those who became naturalized citizens. Natural born citizens of the US can be stripped of Citizenship only in extremely limited cases, but they can voluntarily give it up before a Consular officer.
There are many reasons why the citizenship of a naturalized U.S. citizen can be revoked. Below is a list of the most common causes.
You can be denaturalized or involuntarily be stripped of U.S. citizenship if you commit an act of treason against the United States. Treason is defined as waging a violent war against the United States in cooperation with a foreign country or an organized group. This can include helping such a country or organization abolish the US constitution. Such acts will not only lead to a revocation of your citizenship but also jail time.
Holding a Policy Level Position in another Country
If you are a naturalized citizen of the United States, you can lose your U.S. citizenship if you hold a policy level position in another country. This includes positions such as ambassador, cabinet minister, and so on, not lower ranking positions in the embassy or government.
Serving in the Army of Your Native Country When at War against the US
If you serve in the armed forces of your native country or any other country in any capacity while it is at war with the United States, your U.S. citizenship will be revoked. This means that you should not serve even in a civilian or advisory capacity in the armed forces of a country that is at war with the U.S. if you do not want to lose your U.S. citizenship.
Serving as an Officer in the Army of another Country
If you have a dual citizenship and you serve as an officer or non-commissioned officer in the army of your native country, you may have your U.S. citizenship revoked even if that country is not at war with the U.S.
Lying to the USCIS during the Naturalization interview
To obtain U.S. citizenship you need to apply for a Certificate of naturalization and take the oath of allegiance as well. If after you have obtained the certificate of naturalization, it comes to notice of USCIS or any other authority in the U.S. that you willfully provided misleading or incorrect information during the Citizenship interview, you may be placed in denaturalization process, which is filed by the Attorney General in the U.S. District Court where the naturalized citizen resides.
This is also the case when USCIS discover that Permanent residence was obtained with fraud, most commonly with a sham marriage.
Revocation of Certificate of Naturalization of Spouse or Parent
If your certificate of naturalization was obtained through your spouse or parent that had obtained a certificate of naturalization, then, if their U.S. citizenship is revoked, yours will be revoked as well.
Refusal to Testify before Congress
For ten years after you naturalize as a U.S. citizen, you cannot refuse to testify before Congress about your subversive activities against the United States. If you refuse to testify, your U.S. citizenship can be revoked. If you do testify, you are likely to be charged with treason and your citizenship will be revoked and you will also face time in prison.