18 U.S.C. § 911
Citizen of the United States
Whoever falsely and willfully represents himself to be a citizen of the United States shall be fined under this title or imprisoned not more than three years, or both.
( June 25, 1948, ch. 645 , 62 Stat. 742 ; Pub. L. 103–322, title XXXIII, § 330016(1)(H) , Sept. 13, 1994 , 108 Stat. 2147 .)