Immigration · Primary-source case analysis

Kungys: Denaturalization Uses Different Rules for Material Misrepresentation and False Testimony

By Aneeta Mishra and Timothy Chan

Published September 4, 2026

Kungys v. United States reviewed a denaturalization judgment involving false accounts of the petitioner's date and place of birth, wartime residence, and occupation. The Court separated the statute's concealment-or-misrepresentation ground from the good-moral-character provision governing false testimony.

The government pursued more than one statutory path

Section 1451(a) permits revocation when citizenship was illegally procured or procured through concealment of a material fact or willful misrepresentation. The government alleged that statements made in the visa and naturalization process supported both routes, so each statutory element had to be tested separately.

Materiality asks whether the fact could influence the decision

For concealment or willful misrepresentation, the Court adopted the familiar natural-tendency test: the concealed or misstated fact must have been predictably capable of affecting the official decision. The government also bears the demanding clear, unequivocal, and convincing burden used in denaturalization cases.

False testimony is narrower in form but not limited by materiality

The false-testimony provision covers oral statements made under oath with the subjective intent to obtain an immigration or naturalization benefit. It does not reach every written falsehood, and it does not require that the lie be material. The speaker's purpose, rather than the objective importance of the statement, supplies the limiting principle.

The judgment was reversed and the case remanded

The Court concluded that the false date and place of birth had not been shown material under the governing standard. It returned the case for the lower court to address other alleged misrepresentations and unresolved questions under the distinct statutory grounds. Because portions of the reasoning drew separate opinions, later analysis should identify the proposition and controlling vote rather than treating every passage as a single majority rule.

Key takeaways

• Separate illegal procurement from procurement by material concealment or misrepresentation.
• For materiality, ask whether the true fact predictably could have affected the official inquiry or decision.
• For false testimony, identify an oral statement under oath and the subjective purpose of obtaining an immigration benefit.
• Apply the heightened proof standard and track which propositions commanded a majority.