Disaster fraud is a fraud whose occasion is a natural disaster, a declared emergency or the relief effort that follows one. It covers several unrelated schemes that share a moment rather than a method: impersonating a federal disaster official, taking payment for repairs that are never made or never finished, and filing for disaster assistance in someone else's name or on false facts.
It is not merely a descriptive label. 18 U.S.C. 1040, headed "Fraud in connection with major disaster or emergency benefits," makes it a federal crime to knowingly falsify, conceal or cover up a material fact by any trick, scheme or device, or to make a materially false statement or use a false document, in connection with a benefit authorized, transported, transmitted, transferred, disbursed or paid in connection with a major disaster declaration under section 401 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act, an emergency declaration under section 501 of the same Act, or the procurement of property or services related to such a declaration as a prime contractor with the United States, or as a subcontractor or supplier on a contract with a federal prime contract behind it. The penalty is a fine, imprisonment for up to 30 years, or both, and the statute defines "benefit" broadly as "any record, voucher, payment, money or thing of value, good, service, right, or privilege provided by the United States, a State or local government, or other entity."
Separately, 18 U.S.C. 1343 raises the ceiling on wire fraud, from 20 years to 30 years and a fine of up to $1,000,000, where the violation occurs "in relation to, or involving any benefit … paid in connection with, a presidentially declared major disaster or emergency." Our page on wire fraud covers that offense in general; what matters here is that the disaster context is written into the sentencing rather than treated as an aggravating fact a court might notice.
One boundary is worth drawing at the front, because intuition puts it in the wrong place. A fraudulent appeal for donations to help disaster victims is a charity scam, not disaster fraud. The FBI's own crime-type definition for charity offenses expressly reaches deception aimed at people who believe they are donating to "charities representing victims of natural disasters shortly after the incident occurs." Disaster fraud, on this page, is about money extracted from the survivor and from the relief system, not solicited from the public.