Denaturalization, How the US Can Revoke Citizenship Under Federal Law

Yes, the United States can revoke naturalized citizenship, but only by proving a legally recognized ground in court, to a very high standard of proof, or by securing a criminal conviction under 18 U.S.C. § 1425. An investigation, an accusation, a press release, a political statement or an agency referral does not cancel anyone’s citizenship.

Quick Facts: Can the U.S. Government Take Away Citizenship?

Question	Short Answer
What is denaturalization?	The legal process of revoking citizenship that a person acquired through naturalization.
Main civil law	8 U.S.C. § 1451(a) (Section 340 of the Immigration and Nationality Act).
Main criminal law	18 U.S.C. § 1425, with mandatory revocation under 8 U.S.C. § 1451(e) after conviction.
Where is a civil case filed?	A U.S. District Court (federal court), not an administrative agency.
Civil burden of proof	Clear, unequivocal and convincing evidence.
Criminal burden of proof	Beyond a reasonable doubt.
Two civil grounds	(1) Citizenship was illegally procured; (2) citizenship was procured by concealment of a material fact or willful misrepresentation.
Time to answer a civil complaint	60 days’ personal notice, unless waived (§ 1451(b)).
Statute of limitations (civil)	None written into § 1451.
Statute of limitations (criminal)	Generally 10 years (18 U.S.C. § 3291).
Court-appointed lawyer in a civil case?	No automatic right.
Can an investigation alone revoke citizenship?	No. Revocation requires a court order (civil) or a conviction (criminal).
Can a U.S.-born citizen be denaturalized?	No. Denaturalization applies only to naturalized citizenship.
Is the revocation retroactive?	Yes. Under § 1451(a), revocation is effective as of the original date of the naturalization order and certificate.
Is DOJ filing more cases?	Yes. DOJ announced 123 civil complaints between January 20, 2025 and August 3, 2026, and 40 more in an October 5, 2026 announcement. Complaints are allegations, not final judgments.

What Is Denaturalization?

Denaturalization is the revocation of citizenship that a person obtained through the naturalization process.

Naturalization generally allows an eligible noncitizen to become a U.S. citizen after meeting statutory requirements. These typically include lawful admission for permanent residence, a period of continuous residence and physical presence, good moral character, attachment to the principles of the Constitution, basic English and civics knowledge, and an oath of allegiance, subject to exceptions such as those for certain military service, spouses of U.S. citizens and applicants with qualifying disabilities.

The government may challenge a completed naturalization if the person was not legally eligible when citizenship was granted, or if citizenship was obtained through a qualifying concealment or willful misrepresentation. The government is not deciding that a naturalized citizen should lose citizenship because of something that happened years later. The legal question is whether the original naturalization was legally defective or was procured through conduct the statute covers.

Denaturalization vs. Expatriation vs. Deportation

These three terms are often confused.

Concept	What it means	Who it applies to	Governing law
Denaturalization	A court revokes citizenship obtained by naturalization because it was unlawfully procured	Naturalized citizens only	8 U.S.C. § 1451; 18 U.S.C. § 1425
Expatriation	Loss of nationality through specified voluntary acts done with intent to relinquish citizenship	Any citizen, including U.S.-born	8 U.S.C. § 1481
Deportation (removal)	An immigration judge orders a noncitizen removed from the U.S.	Noncitizens only	8 U.S.C. §§ 1227, 1229a

Denaturalization and deportation are separate legal steps. Denaturalization can lead to removal proceedings, because the person is treated as a noncitizen again, but it does not automatically result in deportation.

The Constitutional Background

The Fourteenth Amendment provides that all persons born or naturalized in the United States, and subject to its jurisdiction, are citizens of the United States and of the state where they reside.

Two lines of Supreme Court authority frame the issue:

• Citizens cannot be stripped of citizenship involuntarily as a general matter. In Afroyim v. Rusk, 387 U.S. 253 (1967), the Court held that Congress cannot take away citizenship without the citizen’s voluntary renunciation. In Vance v. Terrazas, 444 U.S. 252 (1980), the Court held that the government must prove the citizen intended to relinquish citizenship.
• Citizenship procured unlawfully is treated differently. Courts have long recognized that Congress may provide for revocation of naturalization that was never validly obtained. See Johannessen v. United States, 225 U.S. 227 (1912). Because a person who did not meet the legal requirements never became a citizen in the eyes of the law, revocation is treated as correcting an illegal grant, not as taking away a right the person validly held.

Because losing citizenship can mean permanent exile, the Supreme Court has repeatedly called citizenship a precious right and demanded strong proof before it may be revoked.

The Laws That Govern Denaturalization

Different provisions do different jobs. Section 1451 is not a blanket power to revoke citizenship whenever an agency finds something undesirable about a citizen.

Law	What it does
8 U.S.C. § 1451 (INA § 340)	The core revocation statute: civil revocation, notice, certain organizational affiliations, derivative citizenship, revocation after criminal conviction, cancellation of certificates, and the Attorney General’s power to correct or vacate naturalization orders.
8 U.S.C. § 1427 (INA § 316)	General requirements for naturalization: lawful permanent residence, continuous residence, physical presence, good moral character, attachment to the Constitution.
8 U.S.C. § 1430	Reduced residence requirement (generally three years) for spouses of U.S. citizens, subject to conditions.
8 U.S.C. § 1423	English-language and civics knowledge requirement.
8 U.S.C. § 1429	Requires lawful admission for permanent residence in compliance with the law, and limits naturalization while removal proceedings are pending.
8 U.S.C. § 1424	Bars naturalization of persons associated with certain organizations or advocacy (for example, anarchists and certain totalitarian or subversive groups).
8 U.S.C. § 1101(f)	Defines who cannot be found to have good moral character, including persons who gave false testimony to obtain an immigration benefit, were convicted of certain crimes, or are described in other listed categories.
8 U.S.C. § 1448	The oath of allegiance.
8 U.S.C. §§ 1439–1440	Naturalization based on military service; § 1440(c) addresses revocation of certain military naturalizations.
8 U.S.C. § 1182(a)(6)(C)(i)	Inadmissibility for fraud or willful misrepresentation of a material fact to obtain an immigration benefit.
18 U.S.C. § 1425	Criminalizes knowingly procuring, or attempting to procure, naturalization or citizenship documents contrary to law.
18 U.S.C. § 1015	Criminalizes certain false statements and fraud relating to naturalization and citizenship.
18 U.S.C. § 1546	Fraud and misuse of visas, permits and immigration documents.
18 U.S.C. § 1001	General federal false-statements offense.
18 U.S.C. § 3291	Ten-year limitations period for specified nationality and citizenship offenses, including § 1425.
8 U.S.C. § 1481	Loss of nationality through specified voluntary acts. A separate route from denaturalization.
8 U.S.C. § 1504	Cancellation of U.S. passports and consular reports of birth issued in error or by fraud.
8 C.F.R. Part 340	Regulations on revocation of naturalization, including referral to the Department of Justice.
8 C.F.R. § 316.10	Regulatory definition of good moral character for naturalization.

Civil Denaturalization Under 8 U.S.C. § 1451(a)

Under § 1451(a), U.S. Attorneys have a duty, upon an affidavit showing good cause, to bring proceedings in the federal district court where the naturalized citizen resides. If the person does not reside in any U.S. judicial district, the case may be brought in the U.S. District Court for the District of Columbia or in the district where the person last resided.

The goal is to revoke and set aside the order admitting the person to citizenship and to cancel the certificate of naturalization. The statute states that revocation is effective as of the original date of the order and certificate. In legal effect, the person is treated as never having been naturalized.

The statute names two grounds:

1. The naturalization was illegally procured.
2. The naturalization was procured by concealment of a material fact or by willful misrepresentation.

The statute also includes a narrow provision: a naturalized citizen’s refusal, within ten years of naturalization, to testify before a congressional committee about subversive activities, where the person was convicted of contempt for that refusal, is treated as a ground of concealment or misrepresentation.

The Affidavit of Good Cause

The government must file an affidavit showing good cause. In United States v. Zucca, 351 U.S. 91 (1956), the Supreme Court treated the affidavit as a mandatory procedural requirement. The affidavit is a threshold safeguard against baseless suits. It does not establish the government’s case.

Personal Notice

Under § 1451(b), the person must have sixty days’ personal notice to answer the government’s petition, unless the person waives it. If the person is absent from the country or from the district where they last lived, notice may be given by personal service or by publication in the manner state law allows.

Ground One: Illegal Procurement

A naturalization is illegally procured when the applicant was not legally eligible when it was granted. Intent is not an element of this ground. The question is whether the applicant actually met every statutory requirement.

In Fedorenko v. United States, 449 U.S. 490 (1981), the Supreme Court held that naturalization requires strict compliance with all congressionally imposed prerequisites, and that courts have no equitable discretion to excuse a failure of compliance and leave citizenship in place.

Common illegal-procurement theories include:

• Lack of lawful permanent resident (LPR) status. Citizenship requires lawful admission for permanent residence. If the green card was obtained through fraud or was granted in error, the government may argue the applicant was never lawfully admitted and so could not lawfully naturalize.
• Lack of good moral character. Under § 1427(a)(3) and § 1101(f), certain conduct during the statutory period bars a good-moral-character finding. Examples include certain crimes involving moral turpitude, certain controlled-substance offenses, multiple gambling offenses, significant incarceration, false testimony to obtain an immigration benefit, and certain aggravated felony convictions. Conduct outside the statutory period may also be considered if it bears on present character.
• Failure to satisfy residence or physical-presence requirements.
• Statutory bars. For example, membership in a barred organization under § 1424, or participation in persecution, genocide, torture or extrajudicial killing, which is a listed bar under § 1101(f).
• Naturalizing while barred by pending removal proceedings. Section 1429 limits naturalization while removal proceedings are pending.

False testimony and good moral character. In Kungys, the Court held that the § 1101(f)(6) false-testimony bar has no separate materiality requirement, but applies only to oral statements made under oath with the subjective intent of obtaining immigration benefits. It does not reach every inaccurate statement.

Ground Two: Concealment of a Material Fact or Willful Misrepresentation

In Kungys v. United States, 485 U.S. 759 (1988), the Supreme Court held that to prevail on this ground the government must establish four elements:

1. The naturalized citizen misrepresented or concealed a fact.
2. The misrepresentation or concealment was willful.
3. The fact was material.
4. The citizen procured citizenship as a result of the misrepresentation or concealment.

Materiality. A misrepresentation is material if it has a natural tendency to influence the decision of the immigration authorities. In practice, the government can satisfy this by showing that the true facts would have warranted denial of naturalization, or that disclosure would have predictably led to an investigation uncovering a disqualifying fact. See also Chaunt v. United States, 364 U.S. 350 (1960).

Willfulness. The statement must have been made knowingly and intentionally, not through an innocent mistake, a misunderstood question, a translation error or a clerical error.

Procurement. Where materiality is established, courts apply a framework under which the government’s showing can raise a presumption that citizenship was procured by the misrepresentation, after which the citizen has the opportunity to rebut by showing they were in fact qualified. Courts continue to address how this burden-shifting framework works in specific cases.

Examples the government may allege: concealing a criminal arrest or conviction that bears on eligibility; using a false identity or hiding an alias; misrepresenting residence, marital status or physical presence; concealing prior immigration fraud; concealing membership in a barred organization; or concealing past persecution of others.

An inconsistency in the paperwork is not automatically fraud. The statement, the person’s knowledge, the materiality of the fact and its connection to the grant of citizenship all matter.

The Burden of Proof: “Clear, Unequivocal and Convincing”

In civil denaturalization, the government’s burden is higher than the ordinary civil standard of a preponderance of the evidence, and it is also described as more demanding than the ordinary “clear and convincing” standard used elsewhere. It is still lower than proof beyond a reasonable doubt.

The standard traces to Schneiderman v. United States, 320 U.S. 118 (1943), where the Court held that the evidence must be clear, unequivocal and convincing, not leaving the issue in doubt. The Court reaffirmed it in Baumgartner v. United States, 322 U.S. 665 (1944), Knauer v. United States, 328 U.S. 654 (1946), and Fedorenko.

In practical terms, the court construes the record carefully, and the government cannot rely on speculation or unreliable evidence. Old records, unauthenticated foreign documents and hearsay can all be challenged.

The Supreme Court Cases That Shape Denaturalization

Case	Core holding	Why it matters
Johannessen v. United States, 225 U.S. 227 (1912)	Congress may provide for revocation of naturalization that was unlawfully obtained.	Foundational authority for denaturalization statutes.
Schneiderman v. United States, 320 U.S. 118 (1943)	Government must prove its case by clear, unequivocal and convincing evidence.	Source of the demanding standard of proof.
Baumgartner v. United States, 322 U.S. 665 (1944)	Reaffirmed the heavy burden and rejected revocation on weak or speculative proof.	Protects naturalized citizens from revocation based on doubtful evidence.
Knauer v. United States, 328 U.S. 654 (1946)	Reaffirmed the standard of proof in denaturalization.	Confirms the heavy burden.
Klapprott v. United States, 335 U.S. 601 (1949)	Addressed relief from a default denaturalization judgment.	Important where a citizen did not or could not answer a complaint.
United States v. Zucca, 351 U.S. 91 (1956)	The affidavit of good cause is a mandatory procedural requirement.	Threshold safeguard against baseless suits.
Chaunt v. United States, 364 U.S. 350 (1960)	Government must show the concealed facts would warrant denial of citizenship, not merely that something was concealed.	An early link between concealment and eligibility.
Costello v. United States, 365 U.S. 265 (1961)	Addressed denaturalization proceedings brought long after naturalization.	Relevant to arguments about delay.
Fedorenko v. United States, 449 U.S. 490 (1981)	Strict compliance with statutory prerequisites; no equitable discretion to excuse non-compliance.	Core authority for illegal procurement.
Kungys v. United States, 485 U.S. 759 (1988)	Four-element test for concealment or misrepresentation; defines materiality; limits § 1101(f)(6).	Core authority for the misrepresentation ground.
Maslenjak v. United States, 582 U.S. 335 (2017)	A criminal § 1425(a) conviction requires a causal link between the illegal act and the procurement of citizenship.	Core authority for criminal denaturalization.

Maslenjak v. United States Explained

Divna Maslenjak, an ethnic Serb from Bosnia, entered the United States as a refugee and later became a citizen. Prosecutors alleged she lied during the immigration process about her husband’s service in the Bosnian Serb army and about the circumstances of her claim, and that she repeated falsehoods during naturalization. She was convicted under 18 U.S.C. § 1425(a), which led to revocation of her citizenship.

The Supreme Court vacated the conviction. Justice Kagan, writing for the Court, held that the phrase “contrary to law” in § 1425(a) does not make every false statement a basis for conviction. The government must prove that the defendant’s illegal act played a role in her acquiring citizenship. All the justices agreed on the result, with some writing separately.

The Court described two situations:

• The truth would have disqualified the applicant. If the lied-about fact was itself disqualifying, the causal connection is established.
• The lie would have led to a disqualifying discovery. If the lied-about fact was not itself disqualifying, the government can still prevail by showing that the truth would have prompted an investigation that would predictably have uncovered a disqualifying fact.

The defendant may respond by showing that she was in fact qualified for citizenship despite the lie.

Does Maslenjak Apply to Civil Cases?

Maslenjak interpreted the criminal statute. Civil denaturalization under § 1451(a) is a separate proceeding in which the government must prove the elements of the particular ground it invokes, as Fedorenko and Kungys explain. Maslenjak‘s reasoning is nonetheless central to understanding why a lie must be connected to the acquisition of citizenship, and defendants frequently invoke it in civil cases. How far it extends is a matter courts continue to address. The exact claim and statutory provision always matter.

Criminal Denaturalization Under 18 U.S.C. § 1425

Section 1425 makes it a federal crime to knowingly procure, or attempt to procure, naturalization or citizenship documents contrary to law, whether for oneself or for another person.

Penalties. The statute sets maximum prison terms that depend on the circumstances, including up to 10 years for a first or second offense not tied to terrorism or drug trafficking, up to 15 years for other offenses, up to 20 years where the offense facilitates a drug trafficking crime, and up to 25 years where it facilitates international terrorism, along with fines. Readers should consult the current statutory text, because sentencing depends on the specific subsection and facts.

Automatic revocation. Under 8 U.S.C. § 1451(e), when a person is convicted under § 1425 of knowingly procuring naturalization in violation of law, the court must revoke the naturalization order and declare the certificate canceled. No separate civil trial is required.

Related offenses. Prosecutors may also use 18 U.S.C. § 1015 (naturalization-related false statements), 18 U.S.C. § 1546 (immigration document fraud) and 18 U.S.C. § 1001 (false statements).

Limitations period. 18 U.S.C. § 3291 generally provides ten years to bring a prosecution for the covered nationality and citizenship offenses, including § 1425. This is not a universal deadline for every immigration-related offense.

Civil vs. Criminal Denaturalization

Issue	Civil (8 U.S.C. § 1451(a))	Criminal (18 U.S.C. § 1425)
Forum	Federal district court (civil)	Federal district court (criminal)
Who brings it	U.S. Attorney, with the Department of Justice	Federal prosecutors
Burden of proof	Clear, unequivocal and convincing evidence	Beyond a reasonable doubt
Intent	Not required for illegal procurement; willfulness required for misrepresentation	Knowing conduct required
Statute of limitations	None	Generally 10 years
Right to appointed counsel	No automatic right	Yes (Sixth Amendment)
Outcome	Revocation of naturalization and cancellation of certificate	Criminal penalties plus mandatory revocation under § 1451(e)

The two routes can arise from the same facts but are not interchangeable. Elements, deadlines and procedures must be analyzed separately.

Section 1451 Subsection by Subsection

• § 1451(a): Civil revocation. Authorizes proceedings in federal district court on the two grounds above, upon an affidavit of good cause. Revocation is effective as of the original date of the order. Includes the congressional-testimony provision and venue rules for persons living abroad.
• § 1451(b): Notice. Sixty days’ personal notice to answer, unless waived, with rules for service on absent persons.
• § 1451(c): Certain organizational affiliations. If a person naturalized after December 24, 1952 joins or becomes affiliated, within five years of naturalization, with an organization whose membership would have barred naturalization under § 1424, that is prima facie evidence the person lacked attachment to the Constitution at the time of naturalization. In the absence of countervailing evidence, it can be sufficient to revoke. It is not a rule that any political association or unpopular opinion cancels citizenship.
• § 1451(d): Citizenship claimed through a parent or spouse. Addresses persons who claim citizenship through a parent’s or spouse’s naturalization that is later revoked. If the revocation is under subsection (a) on the ground of concealment or willful misrepresentation, the person is treated as having lost citizenship derived through that naturalization, regardless of where the person lives. If the revocation is under subsection (c) or § 1440(c) on a ground other than concealment or misrepresentation, the person loses it unless residing in the United States at the time. The subsection does not expressly address revocation on the illegal-procurement ground alone, so those cases turn on their own facts and on how each family member acquired citizenship.
• § 1451(e): Revocation after criminal conviction. Mandatory revocation upon conviction under 18 U.S.C. § 1425.
• § 1451(f): Cancellation of the certificate. The court cancels the certificate and sends a certified copy of the order to the Attorney General. The person must surrender the canceled certificate upon notice.
• § 1451(g): Scope. The section applies to naturalizations and certificates issued under the current statute and to historical naturalizations and certificates issued by courts or designated representatives under earlier law. The age of a naturalization does not make the statute inapplicable.
• § 1451(h): Attorney General’s power to correct. Preserves the Attorney General’s authority to correct, reopen, alter, modify or vacate an order naturalizing a person. This should not be mistaken for a power to cancel citizenship administratively at will. USCIS guidance describes revocation of naturalization as requiring a final order in a judicial proceeding.

A note on history: before 1994, § 1451 also contained a ground for revoking naturalization based on taking up permanent residence abroad shortly after naturalization. Congress removed that ground in 1994, so readers should be careful about older sources that still describe it.

How a Denaturalization Case Works, Step by Step

1. Detection or referral. USCIS, Immigration and Customs Enforcement (ICE) Homeland Security Investigations, other agencies, or prosecutors identify a possible unlawful naturalization. Sources include fingerprint matches, criminal records, tips, prior immigration files and later investigations.
2. Review and referral to DOJ. USCIS and other agencies evaluate the file under 8 C.F.R. Part 340 and refer qualifying cases to the Department of Justice. Civil cases are handled by the Civil Division’s Office of Immigration Litigation and by U.S. Attorneys’ offices. Criminal cases are handled by federal prosecutors.
3. Filing. In a civil case, the government files a complaint in federal district court with the affidavit of good cause. In a criminal case, a grand jury indictment or information is filed.
4. Service and the 60-day answer period. The person must be given personal notice and 60 days to answer, unless waived.
5. Litigation. The case proceeds through discovery, motions and, where facts are disputed, trial. Summary judgment is possible in civil cases where the facts are undisputed, and the government still must meet its heavy burden.
6. Judgment. If the government prevails in a civil case, the court revokes and sets aside the naturalization order and cancels the certificate. In a criminal case, revocation follows conviction automatically under § 1451(e).
7. Cancellation and surrender. The court sends the order to the Attorney General and the person must surrender the canceled certificate. The Department of State may separately cancel a U.S. passport under its authority (see 8 U.S.C. § 1504).
8. Appeal. Either side may seek appellate review in the ordinary course. Deadlines are strict.
9. Immigration consequences. After revocation, the person may be placed in removal proceedings if the government has a legal basis for removal.

Default judgments. A person who ignores a complaint risks a default judgment. Courts can sometimes grant relief from a default (see Klapprott v. United States), but relief is not guaranteed and should not be assumed.

An agency interview, a subpoena, a search warrant, an investigation, a press release or a referral is not a final order revoking citizenship.

Is There a Statute of Limitations?

Civil cases. Section 1451 contains no general statute of limitations. The government may bring a qualifying civil case years or decades after naturalization. The passage of time alone does not automatically make a case unlawful.

Time can still create real litigation problems for the government. Original applications may be lost, witnesses may have died, and records may be incomplete or inconsistent, all of which affect whether the government can meet its heavy burden of proof. Courts have addressed delay-based defenses, so whether delay and resulting prejudice can matter in a particular case depends on the facts.

Criminal cases. Under 18 U.S.C. § 3291, the government generally has ten years to bring a prosecution for the covered offenses, including § 1425. Charges outside the limitations period are subject to dismissal.

What Happens After Citizenship Is Revoked?

Because revocation is effective as of the original date of the naturalization order, the law treats the person as never having been naturalized. Consequences can include:

• Return to prior status. The person’s immigration status generally reverts to what it was before naturalization, subject to their actual history. For some people, that is lawful permanent resident status. For others, particularly where the green card itself was obtained by fraud, there may be no lawful status to return to.
• Removal proceedings. The government may place the person in removal proceedings before an immigration judge if it has a legal basis, such as inadmissibility at the time of admission or adjustment of status.
• Loss of rights tied to citizenship. Voting, jury service, a U.S. passport, certain government employment, security clearances and other rights and benefits that depend on citizenship.
• Passport cancellation. The State Department can cancel passports issued on the basis of the revoked citizenship.
• Collateral effects. Possible effects on travel, employment, benefits and family members’ status. In unusual cases where a person previously gave up another nationality, questions of statelessness can arise.

Denaturalization does not by itself decide whether the person will be removed. That is a separate proceeding with its own defenses and forms of relief, which should be evaluated by an immigration attorney.

Effect on Children and Family Members

Whether relatives are affected depends on how each person acquired citizenship.

• Citizenship acquired independently (for example, by birth in the United States) is not canceled because a parent or relative is denaturalized.
• Citizenship claimed through a parent’s or spouse’s naturalization may be affected under § 1451(d), depending on the ground of revocation, the family member’s residence, and how and when citizenship was acquired. The statute does not provide that every relative automatically loses citizenship whenever one person is denaturalized.
• Citizenship through the child-citizenship provisions of immigration law (for example, a child who became a citizen automatically through a parent’s naturalization) requires its own analysis of the law in effect when citizenship was acquired.

Family members should not assume either that they are unaffected or that they have automatically lost status. Their own records and the nationality law that applied to them should be reviewed by an attorney.

Pre-Naturalization Crimes vs. Post-Naturalization Crimes

Crimes committed before naturalization. A person who committed a disqualifying crime before naturalization may face denaturalization if the conduct made them ineligible (illegal procurement) or if they concealed it in a way that satisfies the misrepresentation elements. The nature and timing of the offense, the person’s knowledge, the wording of the questions on the application and the effect on eligibility all matter.

Crimes committed after naturalization. A serious crime committed after becoming a citizen does not by itself show the naturalization was unlawful. Ordinary post-naturalization criminality is not a general ground for revocation under § 1451(a). A later case may still lead investigators to earlier conduct or undisclosed facts, and Congress has enacted narrow provisions on certain post-naturalization circumstances, such as the organizational-affiliation provision in § 1451(c) and certain military-naturalization rules.

Why Denaturalization Cases Are Rising (2016–2026)

Denaturalization was historically rare, used mainly against war criminals and persons accused of fraud. Several developments changed that.

Operation Janus (2016). A Department of Homeland Security Office of Inspector General review found that hundreds of thousands of fingerprint records, over 315,000, from people with prior deportation orders or criminal warrants had not been digitized in the federal database. The review identified more than a thousand people who had received citizenship, in many cases under different identities, despite earlier final removal orders.

Operation Second Look and the 2020 Denaturalization Section. USCIS launched a review of historical files for fingerprint and identity discrepancies. In 2020, DOJ announced a dedicated denaturalization section within the Office of Immigration Litigation in its Civil Division, centralizing civil filings.

2025 policy changes. Executive Order 14161 (January 20, 2025) directed federal officials to devote resources to identifying and acting on offenses described in § 1451. As described in a June 2, 2026 Congressional Research Service overview, a June 11, 2025 DOJ directive made denaturalization a civil enforcement priority. The same CRS report described reported internal guidance calling for USCIS field offices to refer 100 to 200 possible cases per month to DOJ for the rest of fiscal year 2026. That figure was reported internal guidance, not a count of completed denaturalizations.

2026 enforcement announcements. On August 3, 2026, DOJ said it had filed 123 civil denaturalization complaints since January 20, 2025. On October 5, 2026, DOJ announced 40 more complaints filed between August 21 and October 2, which it described as its largest single-period volume in this administration. DOJ described the allegations as involving conduct such as serious violent offenses, sexual offenses and acting as an agent of a foreign government. The October announcement did not state a revised cumulative total, so the August figure should not be presented as the total for 2026.

These are filings, not outcomes. A complaint is an allegation. These announcements do not mean every defendant has been denaturalized, and they do not mean courts have found the allegations true.

Who Is DOJ Prioritizing?

Longstanding DOJ policy identified three priority categories for civil denaturalization:

1. National security. Individuals involved in terrorism, espionage or certain unlawful exports of sensitive goods, technology or information.
2. War crimes and human-rights violations.
3. Very serious felonies that were not disclosed during naturalization.

Public reporting and DOJ announcements indicate the department has broadened its priorities during this period, including categories such as fraud, serious violent or sexual offenses and identity fraud. Enforcement priorities guide which cases DOJ chooses to bring. They do not create new legal grounds for revocation and do not lower the government’s burden of proof.

Does the Government Have Unlimited Power to Revoke Citizenship?

No. More filings do not rewrite § 1451 or the Supreme Court’s decisions on materiality, procurement and the evidentiary burden. The government must still bring the proper proceeding, prove a statutory ground, and satisfy the clear, unequivocal and convincing standard. For readers following any individual investigation, the stages are different: reporting about a person, a government investigation, a filed complaint and a final court judgment are not the same thing.

Legal Defenses

The right defense depends on the government’s actual claim, the facts and the evidence. Possible issues include:

• The government cannot prove a statutory ground. A general assertion that someone was dishonest, controversial or later committed a crime does not establish every element.
• No willfulness. An innocent mistake, a misunderstood question (for example, the difference between an arrest and a citation), a translation error, a clerical error, or reliance on mistaken advice may defeat the willfulness element of a misrepresentation claim.
• No materiality. If the disputed information could not have affected the naturalization decision under the governing standard, the misrepresentation ground may fail (Kungys; Chaunt).
• No procurement or causation. The government must connect the alleged misconduct with the acquisition of citizenship. Maslenjak is central in criminal cases and often invoked in civil ones.
• The person was in fact eligible. Showing the person met every requirement despite the alleged misstatement can defeat the claim, and Maslenjak recognizes this response in the criminal context.
• Failure to meet the burden of proof. Defense counsel can hold the government to the Schneiderman standard, challenging old, incomplete, unauthenticated or unreliable evidence.
• Procedural defects. Missing or defective affidavit of good cause (Zucca), improper notice, improper venue, or other procedural failures.
• Relief from default. Where a default judgment was entered, motions for relief may be available in limited circumstances (Klapprott).
• Delay and prejudice. In some cases, extreme delay may affect the reliability of evidence, even though there is no statute of limitations.
• Constitutional issues. Depending on the facts, due process and other constitutional arguments may arise.

A long period of citizenship does not automatically protect a person. At the same time, the government cannot assume an allegation proves fraud.

Right to Counsel and the Farhane/Singh Circuit Split

In a criminal case, the Sixth Amendment guarantees the right to counsel, including appointed counsel for those who cannot afford a lawyer.

In a civil denaturalization case, there is no automatic right to court-appointed counsel. That makes obtaining qualified legal help especially important.

There is also a developing question about what a criminal defense lawyer must tell a naturalized citizen before a guilty plea. In Padilla v. Kentucky, 559 U.S. 356 (2010), the Supreme Court held that counsel must advise noncitizen clients about deportation risk from a plea. In Chaidez v. United States, 568 U.S. 342 (2013), the Court addressed the limits of that rule.

Two circuits have since split on denaturalization:

• In Farhane v. United States, 121 F.4th 353 (2d Cir. 2024) (en banc), the Second Circuit held that the Sixth Amendment requires defense counsel to advise a naturalized citizen of the risk of denaturalization, and eventual deportation, from a guilty plea.
• In United States v. Singh, 174 F.4th 998 (6th Cir. 2026), the Sixth Circuit disagreed, treating denaturalization as a collateral consequence about which the Sixth Amendment does not require advice. A Supreme Court petition in the case appears on the Court’s docket (No. 26-371), so readers should check its current status.

This issue concerns effective assistance in the underlying criminal case. It does not mean a person in a civil denaturalization proceeding is entitled to appointed counsel. It matters because pleas and admissions can later become evidence in civil litigation about how citizenship was obtained.

What to Do If the Government Challenges Your Citizenship

1. Do not ignore a complaint or notice. You have a limited period to respond (60 days under § 1451(b) for a civil complaint). A default can seriously harm your case even though the government must still prove its claim.
2. Contact a qualified immigration-litigation attorney immediately. If criminal charges, a prior plea or a pending investigation are involved, a criminal-defense attorney should also review the matter.
3. Do not make statements to investigators without legal advice. Statements can be used in later proceedings, and false statements can create new criminal exposure.
4. Identify the precise legal ground. Illegal procurement and concealment or misrepresentation have different elements.
5. Preserve your records. Keep your naturalization application and receipt notices, interview notes, green card records, immigration history, court and criminal records, prior sworn statements, and correspondence with USCIS or former attorneys.
6. Do not destroy, alter or fabricate documents.
7. Do not assume a long time as a citizen protects you. Also do not assume an allegation is accurate. Each case turns on the evidence.

If you receive a notice from USCIS about your naturalization, treat it as serious and get legal advice before responding.

Myths vs. Facts

Myth	Fact
“The government can cancel my citizenship by letter.”	Revocation requires a federal court judgment (civil) or a criminal conviction under § 1425.
“Any mistake on my N-400 means I lose citizenship.”	The government must prove willfulness and materiality for the misrepresentation ground, and the lie must be connected to procurement.
“After 10 years I’m safe.”	There is no civil statute of limitations. The 10-year period applies to criminal prosecution under § 1425.
“Any crime I commit as a citizen can get me denaturalized.”	Post-naturalization crime is not a general ground. The government must prove the naturalization itself was unlawfully procured.
“Denaturalization means automatic deportation.”	Removal is a separate proceeding with its own legal basis.
“U.S.-born citizens can be denaturalized.”	No. Denaturalization applies only to naturalized citizens.
“My children automatically lose citizenship if I do.”	It depends on how each child acquired citizenship and on § 1451(d). It is not automatic in every case.
“A complaint means I have already lost.”	A complaint is an allegation. Only a court judgment or criminal conviction revokes citizenship.
“Political criticism of the government is a ground for denaturalization.”	Political disagreement alone is not a statutory ground. Constitutional protections remain relevant.

Frequently Asked Questions About Denaturalization

Can the U.S. revoke citizenship after 20 or 30 years?

Potentially, yes. Section 1451 contains no general civil statute of limitations. The government must still establish a valid statutory ground and meet the heavy burden of proof, and the age of the case can make that harder.

Can a naturalized citizen lose citizenship for lying on Form N-400?

Potentially. A qualifying material and willful misrepresentation can support civil denaturalization, and a knowing false statement can support criminal charges, but not every inaccurate answer results in revocation.

Is a criminal conviction required before citizenship can be revoked?

No. The government can pursue civil denaturalization under § 1451(a) without a conviction. A conviction under 18 U.S.C. § 1425 separately triggers mandatory revocation under § 1451(e).

Does Maslenjak mean an immaterial lie can never matter?

No. Maslenjak interpreted the criminal statute and requires a causal connection to the procurement of citizenship. Civil cases apply Kungys and Fedorenko. Other theories, such as the good-moral-character bar for false testimony, have different elements.

Can the government revoke citizenship because someone commits a crime after naturalization?

Not automatically. The government must establish a statutory ground. A later offense may lead investigators to earlier conduct, but it is not a general ground for revocation.

Does denaturalization automatically mean deportation?

No. Denaturalization removes citizenship, but removal is a separate process before an immigration judge that requires its own legal basis.

Can U.S.-born citizens be denaturalized?

No. Denaturalization concerns citizenship obtained through naturalization. Separate rules govern voluntary expatriation.

Can citizenship be revoked because of political speech or criticism of the government?

Political disagreement alone is not a statutory ground. The government must prove an applicable legal basis. Cases involving alleged criminal conduct, restricted organizational affiliations or national-security claims require analysis of the specific facts and statutes.

Does a person’s family automatically lose citizenship after denaturalization?

No. It depends on how each family member acquired citizenship and on § 1451(d), which addresses certain claims through a parent or spouse.

Is denaturalization retroactive?

Yes. Under § 1451(a), revocation is effective as of the original date of the naturalization order and certificate.

Who decides whether to bring a denaturalization case?

USCIS and other agencies investigate and refer cases. The Department of Justice, through its Civil Division and U.S. Attorneys’ offices, decides whether to file a civil case. Federal prosecutors decide whether to bring criminal charges.

Does a person have a right to a free lawyer in a civil denaturalization case?

Not automatically. The Sixth Amendment right to appointed counsel applies in criminal prosecutions.

What happens to my green card if I’m denaturalized?

The person generally reverts to the status held before naturalization, but that depends on the facts. If the green card itself was unlawfully obtained, there may be no lawful status to return to.

How many denaturalization cases has DOJ filed in 2026?

DOJ reported 123 civil denaturalization complaints filed from January 20, 2025 through August 3, 2026, and announced another 40 filed between August 21 and October 2, 2026. The October announcement did not give a revised cumulative total. These are allegations, not final judgments.

What is the difference between denaturalization and expatriation?

Denaturalization revokes citizenship obtained through naturalization on statutory grounds. Expatriation concerns specified voluntary acts that can result in loss of nationality when the required intent to relinquish citizenship is proved.

Can someone appeal a denaturalization judgment?

Yes, in the ordinary course, but deadlines are strict and the available grounds depend on the procedural posture. A person facing an adverse judgment should obtain legal advice immediately.

The Bottom Line

The United States can revoke citizenship obtained through naturalization, but the power is governed by statutes and court decisions, not by political statements or agency accusations.

Section 1451 provides the principal civil process. Fedorenko requires strict compliance with the statutory prerequisites, Kungys explains the elements of concealment and misrepresentation, Schneiderman establishes the demanding standard of proof, and Maslenjak explains why criminal unlawful procurement requires a meaningful connection between the alleged misconduct and the acquisition of citizenship.

DOJ’s 2025 and 2026 announcements show that denaturalization is receiving increased enforcement attention. They do not eliminate the government’s obligation to prove each case, and a filed complaint is not a final order revoking citizenship.

For anyone trying to understand a citizenship investigation, the key questions remain the same: Which statute applies? What exactly does the government allege? What evidence supports it? And has a court actually ordered revocation?

Disclaimer: This article is for general informational purposes and does not constitute legal advice. AllAboutLawyer.com is a legal information website, not a law firm. Denaturalization law is complex and changes. Individual cases depend on their facts, applicable statutes and controlling court decisions. If you are facing a denaturalization investigation or lawsuit, consult a licensed immigration or criminal-defense attorney immediately.

Related Articles

• Can Ilhan Omar Lose Her U.S. Citizenship? Denaturalization, Parent-Based Citizenship and Federal Law Explained
• Why Is Trump Investigating Ilhan Omar? Immigration Probe

Sources

Statutes and regulations

1. 8 U.S.C. § 1451 — Revocation of Naturalization (Office of the Law Revision Counsel)
2. 18 U.S.C. § 1425 — Procurement of Citizenship or Naturalization Unlawfully
3. 18 U.S.C. § 3291 — Nationality, Citizenship and Passports
4. 8 U.S.C. §§ 1101(f), 1182(a)(6)(C)(i), 1423, 1424, 1427, 1429, 1430, 1439, 1440, 1448, 1481, 1504; 18 U.S.C. §§ 1001, 1015, 1546; 8 C.F.R. Part 340; 8 C.F.R. § 316.10 (all available through the Office of the Law Revision Counsel and the Electronic Code of Federal Regulations)

Supreme Court and appellate decisions

5. Maslenjak v. United States, 582 U.S. 335 (2017)
6. Kungys v. United States, 485 U.S. 759 (1988)
7. Schneiderman v. United States, 320 U.S. 118 (1943)
8. Fedorenko v. United States, 449 U.S. 490 (1981)
9. Johannessen v. United States, 225 U.S. 227 (1912); Baumgartner v. United States, 322 U.S. 665 (1944); Knauer v. United States, 328 U.S. 654 (1946); Klapprott v. United States, 335 U.S. 601 (1949); United States v. Zucca, 351 U.S. 91 (1956); Chaunt v. United States, 364 U.S. 350 (1960); Costello v. United States, 365 U.S. 265 (1961); Afroyim v. Rusk, 387 U.S. 253 (1967); Vance v. Terrazas, 444 U.S. 252 (1980); Padilla v. Kentucky, 559 U.S. 356 (2010); Chaidez v. United States, 568 U.S. 342 (2013)
10. Farhane v. United States, 121 F.4th 353 (2d Cir. 2024) (en banc)
11. United States v. Singh, 174 F.4th 998 (6th Cir. 2026)

Government and agency guidance

12. USCIS Policy Manual, Volume 12, Part L — Revocation of Naturalization
13. DOJ Justice Manual, Title 4-7.000 — Immigration Litigation
14. DOJ, October 5, 2026 — Denaturalization Filing Announcement
15. Congressional Research Service — Denaturalization: A Brief Overview of the Current Legal Framework, June 2, 2026
16. Congressional Research Service — Sixth Amendment Counsel and Denaturalization, September 10, 2026
17. DHS Office of Inspector General, Operation Janus review (2016), and Executive Order 14161 (January 20, 2025)

Last updated: October 23, 2026.