A certified act of terrorism is a terrorist act that is eligible for coverage under the Terrorism Risk Insurance Act (TRIA). Such acts are certified by the Secretary of the Treasury, applying criteria spelled out in TRIA.
To qualify as a certified act of terrorism, the incident must (1) be a violent act or an act that is dangerous to human life, property, or infrastructure; (2) cause damage within the United States or other area of US sovereignty (e.g., a US embassy, airplane, ship); (3) be committed as part of an effort to coerce the civilian population of the United States or to influence the policy or affect the conduct of the US government by coercion; and (4) produce property-casualty (P&C) insurance losses in excess of $5 million. Insurers paying claims in response to certified acts of terrorism qualify for federal reimbursement.