While most people think U.S. citizenship is permanent, the Immigration and Nationality Act (INA) gives the U.S. government the authority to revoke U.S. citizenship in limited but serious circumstances.
This process, called denaturalization, occurs when a person is found to have obtained citizenship through fraud, willful misrepresentation, or by concealing a material fact during the naturalization process.
The Department of Justice’s Civil Division and immigration services handle these cases, which can lead to the complete loss of nationality and even deportation. Below, we break down the legal grounds, procedures, and consequences of losing U.S. citizenship.
Key Takeaways
- The Immigration and Nationality Act gives the U.S. government power to revoke U.S. citizenship for fraud, willful deception, or disloyal acts.
- Denaturalization is handled by the Department of Justice Civil Division and federal courts.
- Loss of nationality can occur through voluntary acts, such as formally renouncing citizenship abroad.
- Tax liabilities and the exit tax remain enforceable by the Internal Revenue Service.
- Always ensure truthful disclosure in your naturalization application and dealings with immigration services.
Legal Framework: Immigration and Nationality Act (INA)
Under the Immigration and Nationality Act, particularly INA Section 340, the U.S. government can revoke citizenship from any person who:
- Illegally obtained naturalization through fraud or willful deception.
- Misrepresented or concealed facts during their naturalization process.
- Joined the armed forces or naval forces of a foreign state that is hostile to the United States.
- Swore allegiance to a foreign government or political subdivision thereof.
These acts constitute grounds for loss of nationality when performed voluntarily and with the intention to relinquish United States nationality.
The Denaturalization Process
The denaturalization process begins when the Civil Division of the Department of Justice investigates evidence that a citizen may have obtained naturalization unlawfully. If there’s sufficient evidence, the Attorney’s Office may file a civil case seeking to cancel the person’s citizenship certificate.
Common grounds include:
- Willful misrepresentation or concealed fact during the naturalization application.
- Membership in the communist party, totalitarian party, or certain organizations.
- Accepting employment with a foreign government or military service in violation of U.S. law.
- Ordered deported but later obtained naturalization fraudulently.
If the court finds the person was not eligible to obtain naturalization, the citizenship is revoked.
Citizenship Revocation and the Armed Forces
The Immigration and Nationality Act also allows for revocation when a person:
- Joins the armed forces or naval forces of a foreign state without authorization.
- Fights against the United States or serves a foreign government.
- Takes an oath of allegiance to a foreign country or its political subdivision thereof.
Even if served honorably, such acts can trigger a determination of loss of nationality when performed voluntarily and with full understanding of the consequences.
Fraud and Misrepresentation in Naturalization
Fraud is one of the most common reasons for revocation. If a person provides false evidence, commits deliberate deceit, or hides a material fact to obtain naturalization, the Civil Division can initiate proceedings even ten years after naturalization.
Examples include:
- Lying about residence or physical presence in the U.S.
- Concealing a criminal record or prior ordered deportation.
- Submitting false forms or falsified birth certificate.
- Claiming good moral character under false pretenses.
Loss of Nationality Through Voluntary Actions
The INA Section 349 outlines acts that result in loss of nationality, including:
- Formally renouncing citizenship before a consular officer or diplomatic officer at a consulate abroad.
- Taking an oath to a foreign state or foreign government.
- Engaging in military service of a foreign country hostile to the U.S.
- Serving in a non commissioned officer role under a foreign government.
- Accepting employment in a foreign government’s department, political subdivision thereof, or foreign state.
These must be voluntary actions showing intention to relinquish United States nationality.
Connection to Tax and Expatriation Obligations
Even after formally renouncing citizenship, individuals remain subject to the Internal Revenue Service (IRS) for certain tax liabilities. The IRS may assess exit tax obligations under the renunciation process.
Learn more about this in our guide on Exit Tax Explained: A U.S. Expats Guide to Expatriation Tax.
Can You Legally Renounce U.S. Citizenship?
Yes. While the U.S. government can revoke citizenship, individuals can also formally renounce it voluntarily through the renunciation process.
This must be done in person before a U.S. consular officer at a consulate abroad, accompanied by a formal declaration of intent.
Our detailed guide on Renouncing U.S. Citizenship explains the steps, documents, and tax liability implications.
Consequences of Citizenship Revocation
Losing U.S. citizenship affects:
- Permanent residence and ability to return to the U.S.
- Social Security benefits eligibility.
- Obligations to the Internal Revenue Service for prior tax liability.
- Access to U.S. government services or protection abroad.
A person who loses citizenship is treated as an alien and may be deported if they lack valid lawful admission.
Protecting Your U.S. Citizenship
To safeguard your citizenship, maintain good moral character, follow immigration law, and provide truthful evidence during the naturalization interview and application. Avoid willful misrepresentation or actions that show intention to serve a foreign state against U.S. interests.
If you plan to live abroad or formally renouncing citizenship, consult with both immigration services and the Internal Revenue Service to understand your tax liability and obligations.
Evidence:
All legal grounds and processes referenced above derive from the Immigration and Nationality Act (INA Sections 340 & 349), the Department of Justice Civil Division, and U.S. Citizenship and Immigration Services (USCIS) procedural guidelines.




