Some of the most important legal principles for combating money laundering and terrorist financing and the requirement of proof of source of funds in Germany (as one example for the legal situation in the European Union) can be found under the following links: Money Laundering Act ("Geldwäschegesetz", GwG) BaFin application and interpretation notes on the GwG BaFin application and interpretation notes on the GwG (especially for credit institutions) "AML1 Directive": Directive 91/308/EEC on the prevention of money laundering "AML2 Directive": Directive 2001/97/EC on the prevention of money laundering "AML3 Directive": Directive 2005/60/EC on the prevention of money laundering "AML4 Directive": Directive (EU) 2015/849 on the prevention of money laundering "AML5 Directive": Directive (EU) 2018/843 on the prevention of money laundering "AML6 Directive": Directive (EU) 2018/1673 on the prevention of money laundering Common guidelines on risk factors for money laundering pursuant to Directive (EU) 2015/849