Can US Citizenship Be Revoked? (Denaturalization Facts)

Can US Citizenship Be Revoked?

Most naturalized citizens assume their status is permanent once the oath ceremony ends. It isn't. Denaturalization—the legal process through which citizenship is revoked—happens when the government proves a naturalized citizen obtained citizenship through fraud, concealment, or willful misrepresentation. While denaturalization cases remain rare compared to the total naturalized population, the consequences include loss of citizenship, deportation, and permanent inadmissibility to the United States.

Yes, US citizenship can be revoked, but only through a specific legal process called denaturalization, and only for naturalized citizens—those who became citizens after birth. Natural-born citizens (those born in the US or born abroad to US citizen parents) cannot have their citizenship revoked under any circumstances. Denaturalization requires the government to file a civil lawsuit in federal court proving that citizenship was obtained improperly. This article explains the statutory grounds, the court process, how denaturalization differs from other immigration consequences, and what triggers federal scrutiny decades after naturalization.

Who Can Lose US Citizenship?

Only naturalized citizens face denaturalization risk. Natural-born citizens—individuals born on US soil or born abroad to at least one US citizen parent—hold citizenship under the Fourteenth Amendment and cannot have it revoked, regardless of conduct. This distinction matters because naturalization is a statutory grant governed by the Immigration and Nationality Act (INA), while birthright citizenship is constitutional.

A naturalized citizen obtained citizenship through Form N-400, the Application for Naturalization, and subsequent approval by USCIS. Because naturalization is granted based on representations made during the application and interview, any material misrepresentation or fraud in that process creates a basis for revocation. Natural-born citizens never go through an application process, so there is no procedural foundation to challenge.

The Legal Grounds for Denaturalization

The government can file a denaturalization lawsuit under INA § 340, which allows citizenship to be revoked if it was:

1. Illegally procured: The applicant was not actually eligible for naturalization at the time it was granted—most often because they did not meet the continuous residence requirement, the physical presence requirement, or the good moral character requirement.
2. Procured by concealment of a material fact or willful misrepresentation: The applicant lied about or omitted facts that would have affected the decision to approve naturalization—criminal history, immigration violations, prior marriages, true name, or organizational affiliations.

The government must prove the fraud or illegality by clear and convincing evidence, a higher standard than the preponderance standard used in most civil cases. The misrepresentation must have been material—meaning it would have affected USCIS's decision to approve the application had the truth been known at the time.

What Triggers a Denaturalization Investigation?

Denaturalization cases typically begin in one of three ways:

1. A subsequent criminal arrest or conviction: When a naturalized citizen is arrested or convicted of a serious crime, federal databases flag prior immigration history. If the crime involves conduct that occurred before naturalization but was not disclosed on Form N-400, it raises concealment questions.
2. National security or terrorism concerns: USCIS and the Department of Justice maintain ongoing investigations into individuals who obtained citizenship while concealing ties to organizations designated as terrorist groups or who misrepresented military service abroad.
3. Fraud discovered through another immigration petition: When a naturalized citizen sponsors a family member, USCIS reviews the sponsor's entire immigration file. Inconsistencies between the original green card application, the naturalization application, and the current petition can trigger referrals to the Office of Immigration Litigation.

The government has no statute of limitations on denaturalization for fraud. Cases have been filed 20, 30, even 40 years after the oath ceremony when new evidence surfaces.

How Denaturalization Differs from Other Immigration Consequences

Denaturalization is not the same as losing lawful permanent resident (LPR) status. A green card holder can be placed in removal proceedings for criminal convictions, immigration violations, or abandonment of residence without needing a court proceeding to strip the status—removal proceedings themselves determine whether the individual keeps or loses LPR status.

Denaturalization, by contrast, requires a separate civil lawsuit filed in US District Court. The government is the plaintiff; the naturalized citizen is the defendant. The citizen has the right to legal representation, to present evidence, and to a trial. Only after the court issues a judgment revoking citizenship can the government then initiate removal proceedings. The burden of proof is on the government throughout.

Common Denaturalization Fact Patterns

The cases the Department of Justice prioritizes fall into predictable categories:

• Concealed criminal history: Failing to disclose arrests, charges, or convictions on Form N-400, even if the charges were dismissed or expunged under state law. Immigration law requires disclosure of all arrests regardless of outcome.
• False claims about residence or presence: Claiming continuous residence when the applicant actually lived abroad for extended periods, or inflating the number of days physically present in the US.
• Undisclosed prior marriages or divorces: Failing to list a previous marriage on the naturalization application, especially when that marriage was used to obtain a green card.
• Membership in prohibited organizations: Concealing membership in or affiliation with organizations that advocate violence, terrorism, or totalitarian government—specifically Communist Party membership during certain periods, or designated terrorist organizations.
• War crimes or human rights violations: Concealing participation in persecution, genocide, or torture abroad. These cases often involve individuals who served in foreign military or paramilitary units.
• Fraudulent basis for the underlying green card: If the green card itself was obtained through fraud (such as a sham marriage), and the applicant then naturalized, the government can argue that naturalization was illegally procured because the applicant was never lawfully entitled to permanent residence.

Material means the fact would have affected USCIS's decision. A speeding ticket not disclosed is unlikely to be material; an arrest for assault that was dismissed but not listed is material because it bears on good moral character.

Here's the Honest Answer: The Government Doesn't File These Lightly

Denaturalization is resource-intensive for the government. It requires reopening a closed naturalization file, gathering evidence that may be decades old, and proving fraud in federal court where the citizen has full due process rights. For that reason, the Department of Justice pursues cases it believes it can win—serious fraud, national security concerns, or war crimes—not incidental omissions or minor inconsistencies. If a naturalized citizen has been living lawfully for years, works openly, pays taxes, and has no criminal record, the likelihood of a denaturalization investigation is extremely low. But where the government does file, it prosecutes aggressively, and the consequences are permanent.

The Court Process

Denaturalization begins with the filing of a complaint in US District Court. The complaint sets out the government's allegations—what the defendant said on the naturalization application, what the truth was, and why it matters. The citizen (now a defendant) files an answer and can raise defenses.

Discovery proceeds as in any civil lawsuit: depositions, document production, interrogatories. The government will subpoena the defendant's entire immigration file, criminal records, travel records, employment history, and often testimony from USCIS officers who adjudicated the original application.

The case proceeds to trial unless the defendant settles. Settlement typically means agreeing to a judgment of denaturalization, which avoids the expense and risk of trial but still results in loss of citizenship. At trial, the government must prove its case by clear and convincing evidence. If it succeeds, the court enters a judgment revoking the certificate of naturalization. The defendant can appeal to the circuit court of appeals.

Once the judgment is final, USCIS cancels the certificate of naturalization and updates federal databases. The individual reverts to their prior immigration status—if they were a lawful permanent resident before naturalizing, they may revert to LPR status; if the underlying green card was also fraudulent, they become deportable and are placed in removal proceedings.

What If I Made a Mistake on My N-400 Years Ago?

A mistake is not fraud. Fraud requires willfulness—knowingly providing false information or deliberately concealing a material fact. If you misunderstood a question, misremembered a date, or made a good-faith error, that is not a basis for denaturalization. The government must prove intent to deceive.

That said, if you realize after naturalization that information on your Form N-400 was incorrect, consult an immigration attorney before taking any action. Voluntarily reporting an old error does not always protect you, and in some cases it can trigger scrutiny that would not have occurred otherwise. Whether to report depends on what the error was, whether it was material, and whether evidence of the error exists in government records.

What If I'm Contacted by USCIS or DOJ About My Naturalization?

If USCIS or the Department of Justice contacts you about your naturalization case—especially if you receive a letter stating that your case is under review or that an investigation has been opened—do not respond without legal representation. Do not provide documents, do not agree to an interview, and do not attempt to explain yourself in writing. Anything you say or produce can be used in a denaturalization lawsuit.

Retain an attorney experienced in denaturalization defense immediately. The earlier an attorney is involved, the better your position. In some cases, evidence can be marshaled to demonstrate that no fraud occurred; in others, the attorney can negotiate a resolution that avoids trial.

What If I'm a Naturalized Citizen and I'm Arrested?

A criminal arrest as a naturalized citizen does not automatically trigger denaturalization, but it can. If the arrest is for conduct that occurred before you naturalized, and you did not disclose the conduct (or an earlier arrest for similar conduct) on Form N-400, federal authorities may cross-reference your immigration file during the criminal case. If the arrest itself does not lead to scrutiny, a conviction might—especially for offenses involving fraud, false statements, or crimes of moral turpitude.

If you are arrested and you naturalized within the past ten years, inform your criminal defense attorney about your immigration history. Denaturalization defense and criminal defense must be coordinated.

Defenses to Denaturalization

Common defenses in denaturalization cases include:

• Lack of materiality: The omitted or misrepresented fact was not material—it would not have affected USCIS's decision to approve naturalization.
• Lack of willfulness: The error was a mistake, not a deliberate lie. The applicant misunderstood the question or reasonably believed the answer given was correct.
• Statute of limitations on the underlying conduct: While there is no statute of limitations on denaturalization itself, if the government's theory is that the applicant lacked good moral character due to conduct that occurred more than five years before the N-400 was filed, that conduct may be outside the statutory lookback period for good moral character.
• Harmless error: Even if the applicant misrepresented a fact, the applicant was otherwise eligible for naturalization, and the misrepresentation did not affect the outcome.
• Government misconduct: In rare cases, USCIS's own errors or improper procedures during the naturalization process can provide a defense.

Success depends on the facts and the evidence. The government wins the majority of denaturalization cases that go to trial because it only brings cases where the fraud is provable and significant.

Denaturalization and Deportation

Losing citizenship through denaturalization does not by itself result in deportation. After denaturalization, the individual's immigration status reverts to what it was before naturalization—typically lawful permanent resident. If the individual is an LPR in good standing with no grounds of deportability, they remain in the US as a green card holder.

However, if the basis for denaturalization was fraud in obtaining the green card itself, or if the individual has since committed acts that make them deportable (such as certain crimes), then removal proceedings follow. Deportation is a separate proceeding in immigration court, where the individual can apply for relief if eligible.

Can Denaturalization Affect Derivative Citizens?

Yes. When a parent naturalizes, their children under 18 who are lawful permanent residents and living in the parent's custody often derive citizenship automatically under INA § 320. If the parent's naturalization is later revoked, the child's derivative citizenship is also nullified. The child does not automatically lose status if they were unaware of the parent's fraud, but their citizenship certificate is no longer valid, and they revert to LPR status or whatever status they held before the parent naturalized.

Derivative citizens who relied on the parent's naturalization should consult an attorney if the parent's case is under review.

The Immigration Consequences After Denaturalization

A denaturalization judgment appears in federal court records and in all immigration databases. If the individual later applies for any immigration benefit—a visa, reentry after travel, adjustment of status for a family member—the prior denaturalization is a red flag. USCIS and the State Department view prior denaturalization as evidence of fraud and lack of credibility, which affects future adjudications.

If the individual was deported after denaturalization, they are often inadmissible for life unless they obtain a waiver under INA § 212. The waiver standard is high, and approval is discretionary.

Preventing Denaturalization Risk

The only certain way to avoid denaturalization is to answer every question on Form N-400 truthfully and completely. If you are unsure how to answer a question, consult an immigration attorney before filing. If your immigration history is complicated—multiple entries and exits, name changes, arrests (even without convictions), prior marriages, foreign military service, or residence in countries with conflict or instability—legal review of your N-400 before submission is not optional.

Once you have naturalized, the risk does not entirely disappear, but it diminishes sharply if you live lawfully, avoid criminal conduct, and do not provide the government with new reasons to scrutinize your file.

Legal Disclaimer

This article provides general information about denaturalization under US immigration law and does not constitute legal advice. Immigration outcomes depend on individual facts and circumstances. Reading this article does not create an attorney-client relationship with the Law Offices of Peter D. Chu or any of its attorneys. If you are facing a denaturalization investigation, have received a notice from USCIS or the Department of Justice regarding your naturalization, or have questions about past conduct that may affect your citizenship, consult a licensed immigration attorney. Do not rely on general information to make decisions about your case.

For a confidential consultation about citizenship issues or denaturalization defense, contact the firm at 858-268-8823. The consultation fee is $250. The office is located at 4615 Convoy St, San Diego, CA 92111, and is open Monday through Friday, 8:30 AM to 5:30 PM.

Schedule a consultation with the Law Offices of Peter D. Chu — 4615 Convoy St, San Diego, CA 92111 · 858-268-8823 · Mon–Fri, 8:30 AM–5:30 PM. Consultation fee: $250.