FATCA is designed to prevent tax-evasion by U.S. citizens or residents holding foreign accounts or offshore investments. Under the new FATCA regulations, foreign financial institutions (FFIs) must identify U.S. account holders as well as entities under U.S. control (i.e. U.S. persons having a substantial ownership interest in the entity) and provide the IRS with information on their assets, income payments and trade flows during the fiscal year.