Even as crypto and blockchain create a new layer for international transactions, your business is still subject to local rules and regulations. So, you need to respect international sanctions in cases of wars or other diplomatic conflicts. Certain countries or certain individuals might have been blacklisted by the authorities in your jurisdisction. Your business must comply with these restrictions and not allow access to services to such customers. This requires your company to have a team that is well versed and updated with circulars and announcements from various financial and security organizations. These can include the guidelines from the US Securities and Exchange Commission (SEC), Financial Crimes Enforcement Network (FinCen), Financial Action Task Force (FATF), Reserve Bank of India (RBI), and other national and international institutions.