Can Your US Citizenship Really Be Taken Away?

Every year, a small number of Americans open their mailbox and find a federal lawsuit inside. They naturalized years — sometimes decades — ago. They have a passport, a voter registration, maybe a grandchild born in Ohio. And now the Department of Justice is asking a judge to erase all of it, as if the oath in that courthouse had never been administered.

Denaturalization is rare. It is also real, permanent, and getting more attention from the federal government than at any point in decades. Here is how it actually works, who is genuinely exposed, and what the law does — and does not — permit.

The Two Completely Different Ways Citizenship Ends

People lump these together, and it causes a lot of unnecessary panic. In US law, citizenship ends in one of two ways, and they have almost nothing in common.

The first is voluntary expatriation. You decide to give it up. You walk into a consulate, sign a form, and the State Department hands you a Certificate of Loss of Nationality. Nobody is hunting you. You chose the exit.

The second is denaturalization. A judge takes it from you because, in the government’s view, the citizenship was never legally yours to begin with. This is what people mean when they say citizenship can be ‘revoked’ — and it applies only to naturalized citizens, never to someone who was born with it.

Denaturalization: The Only Real Path to Involuntary Loss

The governing statute is 8 U.S.C. § 1451(a), and it is narrow. The government can strip citizenship in three situations.

1. The citizenship was illegally procured

The person was not actually eligible for naturalization the day the oath was administered. A hidden criminal conviction that made them deportable. A marriage-based petition where the marriage wasn’t genuine. A claim to continuous residence that never happened. If the underlying eligibility was missing, the citizenship is voidable.

2. Material facts were concealed or misrepresented

This is the most common theory, and it is broader than it sounds. ‘Material’ means the lie could have influenced the outcome — not that it definitely did. Misspelling your mother’s maiden name is not material. Omitting an arrest, a prior deportation order, an alias, or a stint in a foreign militia is.

3. A barred organization was joined within five years

An old Cold War provision aimed at the Communist Party and similar groups. It survives on paper but is largely unenforceable after Afroyim v. Rusk (1967), which held that Congress cannot take citizenship away without the citizen’s assent.

What the Government Actually Has to Prove

Denaturalization is a civil case, not a criminal one, but it rarely feels that way to the person on the receiving end. The evidentiary standard is ‘clear, unequivocal, and convincing evidence’ — set in Schneiderman v. United States (1943) and reinforced in Fedorenko v. United States (1981). That sits between the ordinary ‘preponderance of the evidence’ bar and ‘beyond a reasonable doubt.’

In practice, that means the government has to show the lie happened and that it mattered. In Kungys v. United States (1988), the Supreme Court refused to strip citizenship from a man who had concealed his wartime activities, because prosecutors could not show the concealment actually affected the naturalization decision. The lesson stuck: build a paper trail, not a hunch.

What Can and Cannot Cost You Citizenship

Situation	Citizenship lost?	Decided by
Lied on the N-400 about a criminal record or prior deportation	Yes — denaturalization	Federal judge, in a civil suit brought by DOJ
Naturalized under a fraudulent identity or fake marriage	Yes — denaturalization	Federal judge; often paired with criminal charges
Committed a serious crime after naturalizing	No — citizenship stands	—
Convicted of treason	No	Trop v. Dulles (1958) — cruel and unusual punishment
Voted in a foreign election	No	Afroyim v. Rusk (1967)
Served in a foreign military voluntarily	Only with intent to relinquish	State Department; presumption is rebuttable
Renounced at a US consulate	Yes — expatriation	State Department, via Certificate of Loss of Nationality

Voluntary Expatriation: The Seven Acts

8 U.S.C. § 1481(a) lists seven ways a person can give up citizenship themselves. The list is dated in places, but it remains the law:

• Naturalizing in another country
• Taking an oath of allegiance to a foreign state
• Serving in a foreign military, if you are a national of that country or it is engaged in hostilities against the US
• Accepting employment with a foreign government under certain conditions
• Formally renouncing before a US diplomatic or consular officer
• Renouncing in writing during a state of war
• Committing treason, desertion, or draft evasion — provisions the Supreme Court has largely gutted

Here is the part that trips people up: Vance v. Terrazas (1980) requires both the act and the specific intent to relinquish citizenship. Holding a second passport, voting abroad, or serving in another country’s army does not automatically cost you anything. The State Department presumes intent for some acts, but that presumption can be beaten.

What Happens After the Gavel Comes Down

Denaturalization does not send anyone straight to an airport. It voids the naturalization ab initio — from the beginning — which usually restores whatever status the person held beforehand, most often lawful permanent residence.

From there, the machinery can move quickly. An LPR with a concealed criminal history faces removal proceedings. A passport becomes void. Derivative family members who naturalized through the same petition can have their own citizenship challenged, though each case is reviewed on its own facts.

And the civil case is often not the only one. Under 18 U.S.C. § 1425, knowingly procuring naturalization unlawfully is a federal crime carrying up to 10 years in prison and a $250,000 fine. A criminal