USCIS Increases Denaturalization Investigations 2026

USCIS and the Department of Justice have expanded their efforts to investigate and pursue denaturalization — the legal process of revoking U.S. citizenship — for individuals who obtained citizenship through fraud, misrepresentation, or concealment of material facts. The expansion includes increased staffing, enhanced database cross-referencing capabilities, and a broader scope of cases under review. For naturalized citizens, understanding how denaturalization works and who may be at risk is increasingly important.

What Is Denaturalization

Denaturalization is the legal process by which the U.S. government revokes an individual's citizenship after it has been granted. Under INA Section 340 (8 U.S.C. 1451), citizenship can be revoked if it was obtained through:

Fraud or misrepresentation: The person made a material misrepresentation or concealed a material fact during the naturalization process.
Illegal procurement: The person did not meet the legal requirements for naturalization at the time it was granted — for example, they lacked the required period of continuous residence, did not meet the good moral character requirement, or were not lawfully admitted for permanent residence.
Membership in subversive organizations: The person was a member of certain organizations (such as the Communist Party or terrorist organizations) within specified time periods before naturalization.
Refusal to testify before Congress: Under certain circumstances, refusal to testify before congressional committees can be grounds for denaturalization.

Denaturalization is a civil proceeding, not a criminal one, though the same conduct may also give rise to criminal charges for immigration fraud. The government must prove its case by "clear, convincing, and unequivocal evidence" — a high standard, though lower than the criminal standard of "beyond a reasonable doubt."

How Cases Are Identified

USCIS has invested in technology and investigative capacity to identify potential denaturalization cases. Key identification methods include:

Fingerprint and Biometric Matching

USCIS's Operation Janus, established in 2016, uses fingerprint analysis to identify individuals who obtained citizenship under a different identity. The operation cross-references fingerprint records from old immigration files (many of which were digitized from paper records) with current databases. When fingerprints match to a different identity — indicating that someone applied for naturalization under a false name — the case is referred for investigation.

Database Cross-Referencing

USCIS cross-references naturalization records with criminal databases, deportation records, and fraud detection systems. If a naturalized citizen's records show a prior deportation order under a different name, a criminal conviction that should have barred naturalization, or other inconsistencies, the case may be flagged for review.

Referrals from Other Agencies

ICE, the FBI, and other law enforcement agencies refer cases to USCIS when they encounter naturalized citizens who may have obtained their citizenship through fraud. Criminal investigations into unrelated matters sometimes uncover evidence of immigration fraud that triggers a denaturalization review.

Tips and Complaints

USCIS accepts tips from the public about suspected citizenship fraud. While anonymous tips alone are not sufficient to initiate denaturalization proceedings, they may trigger preliminary investigations.

Who Is at Risk

Immigration attorneys emphasize that denaturalization cases are still relatively rare and targeted at genuine fraud. However, the expanded investigation efforts mean that more cases are being reviewed. Individuals who may face heightened scrutiny include:

Those who used false identities: Anyone who obtained a green card or citizenship under a different name, date of birth, or nationality is at significant risk.
Those who concealed criminal history: Individuals who failed to disclose criminal arrests or convictions on their naturalization applications, particularly convictions that would have affected their eligibility.
Those with prior deportation orders: Individuals who were previously ordered deported and then re-entered the United States and obtained citizenship without disclosing the prior removal.
Those who obtained fraudulent green cards: If the underlying green card was obtained through fraud (such as a sham marriage), the naturalization based on that green card may also be invalid.
Those who lied about travel or residence: Material misrepresentations about physical presence or continuous residence in the United States during the required statutory period.

If You Are Contacted About a Denaturalization Investigation

Do not answer questions or provide statements to government agents without first consulting an immigration attorney. Denaturalization proceedings can result in the loss of your citizenship and subsequent removal from the United States. Anything you say can and will be used against you. Exercise your right to counsel immediately.

The Denaturalization Process

Denaturalization follows a specific legal process:

Investigation: USCIS conducts an investigation and compiles evidence. This may involve reviewing immigration files, interviewing the individual, collecting biometric data, and gathering evidence from other agencies.
Referral to DOJ: If USCIS determines that there are grounds for denaturalization, it refers the case to the DOJ's Office of Immigration Litigation or the local U.S. Attorney's Office.
Civil complaint: DOJ files a civil complaint in federal district court seeking to revoke the individual's citizenship. The complaint must specify the grounds for denaturalization.
Trial: The case proceeds through federal court, where the government must prove by clear, convincing, and unequivocal evidence that citizenship was improperly obtained. The individual has the right to a jury trial.
Judgment: If the court rules in favor of the government, the individual's citizenship is revoked. They revert to their prior immigration status, which may mean they become a lawful permanent resident, a nonimmigrant, or an undocumented person subject to removal proceedings.

Legal Defenses Against Denaturalization

Individuals facing denaturalization have several potential legal defenses:

Materiality: The government must prove that any misrepresentation or concealment was "material" — meaning it had a natural tendency to influence the naturalization decision. Immaterial misrepresentations, even if false, are not grounds for denaturalization.
Intent: The individual may argue that any false statement was made without intent to deceive — that it was an honest mistake, a misunderstanding of the question, or a language barrier issue.
Statute of limitations: For most denaturalization cases, there is no statute of limitations. However, the passage of time may affect the quality of evidence and the government's ability to meet its burden of proof.
Constitutional protections: The Supreme Court has held that denaturalization proceedings require heightened due process protections because of the gravity of revoking citizenship. The high evidentiary standard reflects this concern.
Changed law: In some cases, conduct that was once disqualifying may no longer be so under current law, which may affect the materiality analysis.

The Human Impact

Denaturalization is one of the most consequential actions the government can take against an individual. Losing U.S. citizenship means losing the right to vote, the right to hold a U.S. passport, the right to live and work in the United States without restriction, and protection from deportation. For individuals who have lived in the United States for decades, raised families, built careers, and established deep community ties, the prospect of denaturalization is devastating.

Civil rights organizations have raised concerns that the expansion of denaturalization investigations may disproportionately target naturalized citizens from certain countries or ethnic backgrounds, and that the investigations may have a chilling effect on eligible immigrants seeking to naturalize.

What Naturalized Citizens Should Know

Immigration attorneys advise naturalized citizens to:

Keep copies of all immigration documents: Maintain complete records of your naturalization certificate, green card application, naturalization application (N-400), and all supporting documents.
Be truthful: If you are ever questioned by USCIS or other government agents, do not provide false information. However, consult an attorney before answering questions.
Understand your rights: If contacted about a denaturalization investigation, you have the right to counsel, the right to remain silent, and the right to a trial in federal court. Exercise these rights.
Do not panic: Denaturalization is a serious matter, but the government faces a high burden of proof. Not every investigation results in a filed case, and not every filed case results in a loss of citizenship.

Frequently Asked Questions

Can the government take away my U.S. citizenship?

Yes, but only through a formal legal process called denaturalization. The government must file a civil lawsuit in federal court and prove by clear, convincing, and unequivocal evidence that your citizenship was obtained through fraud, misrepresentation, or illegal procurement. You have the right to a trial, the right to counsel, and the right to present a defense. Citizenship cannot be revoked arbitrarily or without due process.

Is there a time limit for denaturalization cases?

For most grounds of denaturalization, there is no statute of limitations. The government can seek to revoke citizenship regardless of how long ago it was granted. However, the passage of time may affect the quality of evidence and the government's ability to meet its burden of proof. Some courts have also considered the length of time since naturalization as a factor in the overall analysis.

What happens after my citizenship is revoked?

If your citizenship is revoked, you revert to your prior immigration status. If you were a lawful permanent resident before naturalization, you may retain that status (though the government may separately seek to revoke your green card). If your green card was also obtained through fraud, you may be placed in removal proceedings. Loss of citizenship means you lose the right to vote, hold a U.S. passport, and enjoy other rights of citizenship.

Can a minor mistake on my naturalization application lead to denaturalization?

Minor, immaterial mistakes are generally not grounds for denaturalization. The government must show that the misrepresentation was "material" — that it had a natural tendency to influence the decision to grant citizenship. A typo, an honest memory lapse, or an immaterial omission would not typically support a denaturalization case. However, intentional concealment of material facts, even if they seem minor, could be grounds for revocation.

Do I need a lawyer if USCIS contacts me about my naturalization?

Yes. If USCIS or any government agency contacts you regarding your naturalization, consult an immigration attorney immediately before answering any questions or providing any statements. Denaturalization investigations are serious and the consequences are severe. You have the right to counsel at every stage of the process. Many immigration attorneys offer free or low-cost initial consultations.

Can I appeal a denaturalization order?

Yes. If a federal district court orders your denaturalization, you can appeal to the appropriate federal circuit court of appeals. The appeals court will review the trial court's findings of fact and conclusions of law. If the appeals court reverses the denaturalization order, your citizenship is restored. The appeals process can take months to years.

Last verified: April 2026 · Reviewed by USImmigrationLaw.Today editorial team.

This article is for informational purposes only and does not constitute legal advice. Consult a licensed U.S. immigration attorney for guidance specific to your situation.