Title 18 › PART I — CRIMES › CHAPTER 113B — TERRORISM › § 2339B
Knowingly giving help or resources to a foreign terrorist group that the U.S. has officially listed is a crime. If you give, try to give, or plan to give such support, you can be fined or jailed for up to 20 years, or imprisoned for life if someone dies. To be guilty, you must know the group is a designated terrorist organization or that it does terrorist acts. Banks that find funds tied to such a group must hold those funds and tell the Secretary of the Treasury unless told otherwise. A bank that knowingly breaks that rule faces a civil fine that is the larger of $50,000 per violation or twice the amount it should have held. The Attorney General can ask a federal court to stop people from breaking these rules. The law can apply to acts outside the United States in several cases, for example when the offender is a U.S. citizen or lawful permanent resident, is found in the U.S. after the act, the offense partly happens in the U.S., or it affects interstate or foreign commerce. The Attorney General leads investigations and works with the Treasury on bank matters, and agencies must send criminal evidence to the Attorney General. In civil cases by the U.S., the government can ask courts to protect classified information by redacting papers, using summaries, or agreeing on facts, and such decisions can be appealed quickly (appeals before trial must be filed within 14 days; appeals during trial get fast 4‑day handling rules). The government keeps other legal privileges to protect secrets. You cannot be prosecuted for providing “personnel” unless you knowingly provided one or more people to work under the group’s control or to run its operations; people who act entirely on their own to help a group are not counted as that group’s personnel. The law does not cut into First Amendment rights. Defined terms: “classified information” = secret government material; “financial institution” = banks and similar entities; “funds” = money and financial instruments; “material support or resources” = help such as training, advice, or other aid; “Secretary” = Secretary of the Treasury; “terrorist organization” = a group officially designated under immigration law.
Full Legal Text
Crimes and Criminal Procedure, Source: USLM XML via OLRC
Legislative History
Reference
Citation
18 U.S.C. § 2339B
Title 18, Crimes and Criminal Procedure
Last Updated
Sep 22, 2026
Release point: 119-110