The Foreign Account Tax Compliance Act (FATCA) is a U.S. federal law aimed at ensuring U.S. persons report their non-U.S. financial accounts to the Financial Crimes Enforcement Network (FinCEN). Challenges in implementing FATCA include enhancing operational procedures, insufficient account information, and the need for knowledgeable staff within financial institutions. Compliance involves understanding FATCA requirements, strategic decision-making about client retention, and leveraging technology solutions, such as those offered by Hexanika, to address data sourcing and reporting challenges.