A U.S. law requiring reporting of certain foreign financial assets, often via Form 8938.
FATCA requires U.S. taxpayers to report specified foreign financial assets above certain thresholds on Form 8938, filed with the tax return, and requires foreign institutions to report U.S. account holders. Its thresholds differ from the FBAR's, and many people must file both. It is a major compliance point for immigrants holding assets abroad.
A green-card holder with significant overseas investments may need to file Form 8938 under FATCA.