This chapter provides an in-depth analysis of Anti-Money Laundering (AML) regulations and their critical importance for the FinTech sector. It begins by explaining the core principles of AML and the specific risks posed by virtual assets. The chapter extensively details the evolving guidance and standards set by the Financial Action Task Force (FATF), including the Travel Rule and the challenges of global implementation. It then explores the practical compliance challenges FinTechs face, such as identity verification and transaction monitoring, and outlines the technological tools—like AI, blockchain analytics, and RegTech—used to address them. Furthermore, the chapter examines legal strategies for risk mitigation and conducts a comparative analysis of AML frameworks in key jurisdictions: The Hong Kong SAR of China, the United States, the United Kingdom, and the European Union. The central thesis is that robust, technology-enabled AML compliance is not just a legal obligation but a strategic imperative for FinTech firms to ensure security, maintain trust, and achieve sustainable growth in a heavily scrutinized global financial landscape.