Denaturalization in the US: Grounds, Defenses, and Consequences

Denaturalization in the United States is the legal process by which a federal court cancels a person’s naturalized citizenship and returns them to their prior immigration status. The Department of Justice can pursue it as a civil lawsuit or as a criminal prosecution, and neither route has a deadline. Cases are uncommon, but the consequences are heavy: loss of the U.S. passport and the right to vote, exposure to deportation, and, in criminal cases, prison.

When the Government Can Revoke Naturalized Citizenship

Federal law recognizes four distinct grounds, and each one targets a different flaw in how citizenship was granted or how the new citizen behaved afterward.

You Were Never Eligible

Citizenship is treated as illegally procured when the applicant failed to meet a statutory requirement at the time of naturalization. The common examples are the five years of continuous residence after getting a green card and the good moral character requirement covering that same period.¹ An approval at the time doesn’t cure the underlying ineligibility if it surfaces later.

You Concealed or Misrepresented Something Material

The government can revoke citizenship if the applicant lied on the application or in the interview, or hid a fact that mattered to the decision.² Under Kungys v. United States, a misrepresentation is “material” when it had a natural tendency to influence the decision on eligibility.³ Hiding a criminal record, using a false identity, or concealing a prior deportation order are common triggers.

In Maslenjak v. United States, the Supreme Court added a causation requirement: the false statement must have altered the naturalization process enough to have influenced the outcome. When the government’s theory is that a lie kept investigators from finding a disqualifying fact, it has to show that the misrepresented fact would have prompted a reasonable official to investigate further, and that the investigation would predictably have uncovered a legal disqualification.⁴

You Joined a Prohibited Organization Within Five Years

If a naturalized citizen affiliates with certain organizations within five years of naturalization, the law treats that membership as presumptive evidence that the person was not genuinely attached to the Constitution when they took the oath.² The list includes the Communist Party of the United States, other totalitarian parties (domestic or foreign), and organizations advocating world communism or totalitarian dictatorship.⁵ The presumption can be rebutted.

You Naturalized Through Military Service and Were Discharged Badly

People who obtained citizenship through active-duty service can lose it if they are separated from the Armed Forces under other than honorable conditions before completing five years of honorable service. The military branch determines whether the service qualifies.⁶

How a Denaturalization Case Actually Works

Most cases are civil. The Department of Justice files a lawsuit in the federal district court where the naturalized citizen lives, asking the court to cancel the certificate of naturalization.⁷ There is no jury. Under Luria v. United States, a denaturalization suit is a suit in equity, so the Seventh Amendment does not apply and a federal judge alone decides the case.⁸ There is also no right to a court-appointed attorney; you hire counsel or represent yourself.

The government’s burden is high. Under Schneiderman v. United States, the evidence must be “clear, unequivocal, and convincing” and cannot rest on a bare preponderance that leaves the issue in doubt.⁹ That is well above the ordinary civil “more likely than not” standard. If the government wins, the court cancels the certificate and revokes citizenship, and the person can appeal to the federal circuit court of appeals; because the United States is always a party, the notice of appeal is due 60 days after judgment rather than 30.¹⁰

The government can also prosecute denaturalization criminally under 18 U.S.C. 1425, which makes it a crime to knowingly obtain or attempt to obtain naturalization unlawfully. Here the standard is proof beyond a reasonable doubt, and the defendant has the right to a jury and to appointed counsel if they cannot afford one. Penalties reach up to 10 years for a first or second offense, 15 years for a third or later offense, 20 years if drug trafficking is involved, and 25 years if the case involves international terrorism, plus fines.¹¹ A conviction supplies the basis for revoking citizenship as part of the judgment.

There Is No Statute of Limitations

Civil denaturalization has no deadline. A lawsuit can be filed 10, 20, or 40 years after naturalization. Old cases often surface through a later background check, a tip, or an investigation that started with someone else. Time itself does not create a defense.

What You Can Argue in Your Defense

The strongest defense, recognized in Maslenjak, is that you actually qualified for citizenship despite the misstatement. If the lie did not change the outcome, the government’s case fails, and this is a complete defense in both civil and criminal cases.⁴

Other arguments that can defeat or weaken the case:

The misrepresentation or omission was not material under Kungys because it had no natural tendency to affect the decision.³
The question on the application was genuinely ambiguous and the answer was reasonable under a fair reading, so the answer cannot be treated as fraudulent.
The government’s evidence falls short of “clear, unequivocal, and convincing,” and reasonable doubts are supposed to be resolved in the citizen’s favor.⁹
In a prohibited-organization case, evidence that you were genuinely attached to constitutional principles at naturalization rebuts the presumption.

Criminal defendants also have the full Sixth Amendment protections, including effective assistance of counsel and the right to challenge the government’s failure to disclose favorable evidence.

What Happens After Citizenship Is Revoked

Once a court revokes citizenship, the person returns to whatever immigration status they held immediately before naturalization, as of the original date they became a citizen. For most people, that means going back to lawful permanent resident status.¹² The catch is that the same facts that triggered revocation, such as concealed criminal conduct or fraud, can independently make the person removable under immigration law. So the green card can be short-lived.

Removal brings further consequences. Social Security retirement and disability benefits are terminated for anyone deported, effective the month after the Social Security Administration receives notice of the removal. Dependent and survivor benefits on that person’s record are also cut off unless the dependent is a U.S. citizen or was physically present in the United States for the entire month in question. Benefits can resume only if the person is lawfully readmitted as a permanent resident.

How It Can Affect Your Spouse and Children

Family members who obtained their own citizenship through the naturalized person can be affected, and the rule depends on the ground for revocation.

If citizenship is revoked for concealment of a material fact or willful misrepresentation, derivative citizens lose their citizenship as well, regardless of where they live and regardless of whether they knew about the fraud.² That result is automatic under the statute.

A gentler rule applies when revocation is based on joining a prohibited organization or on the military provision for reasons other than fraud. Derivative citizens residing in the United States at the time of revocation keep their citizenship; those living outside the country at that time lose their derived status.² A U.S.-resident spouse or child can retain citizenship even when the naturalized person loses theirs, so long as fraud was not the reason.

USCIS Cannot Take Your Citizenship by Itself

USCIS has no power to revoke naturalization once citizenship has been granted. A 2001 federal court injunction confirmed that only a federal court can strip that status.¹³ There is one narrow window where the agency can act alone: after an application is approved but before the oath of allegiance is administered, USCIS can file a motion to reopen the approved application if disqualifying information surfaces. The applicant then has 15 days to respond and overcome the derogatory information.¹⁴ USCIS also has authority to cancel a certificate that was created illegally or fraudulently by someone who never actually went through naturalization, but it cannot use that authority as a shortcut around a judicial denaturalization case.

1
Office of the Law Revision Counsel. 8 U.S.C. 1427 – Requirements of Naturalization
2
Office of the Law Revision Counsel. 8 U.S.C. 1451 – Revocation of Naturalization
3
Justia. Kungys v. United States, 485 U.S. 759 (1988)
4
Supreme Court of the United States. Maslenjak v. United States
5
Office of the Law Revision Counsel. 8 U.S.C. 1424 – Prohibition Upon the Naturalization of Persons
6
Office of the Law Revision Counsel. 8 U.S.C. 1440 – Naturalization Through Active-Duty Service in the Armed Forces
7
United States Department of Justice. Justice Manual 4-7.000 – Immigration Litigation
8
Justia. Luria v. United States, 231 U.S. 9 (1913)
9
Justia. Schneiderman v. United States, 320 U.S. 118 (1943)
10
Legal Information Institute. Federal Rules of Appellate Procedure Rule 4 – Appeal as of Right, When Taken
11
Office of the Law Revision Counsel. 18 U.S.C. 1425 – Procurement of Citizenship or Naturalization Unlawfully
12
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part L Chapter 3 – Effects of Revocation of Naturalization
13
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part L Chapter 1 – Purpose and Background
14
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part B Chapter 5 – Motion to Reopen