The money is no longer just an instrument of payment, in today's society it becomes a measure of the value of people. Social status and reputation depend on the money, and they become increasingly important. For this reason, many people resort to criminal activities to enrich. To make money obtained from criminal activities legalized criminals use the process of money laundering, it involves concealing illegal origin of money. There are many techniques and methods of money laundering, whose number thanks to the Internet, ebusiness and the rapid development of technology is constantly increasing. Money laundering is more developed and complex global issue, and has potentially devastating economic, security and social consequences. For this reason there was a need for measures and actions to prevent money laundering and financing of terrorism, carried out by the financial intelligence unit. In Croatia, this role has the Anti-Money Laundering Office, whose activities are regulated by the Law for prevention of money laundering and terrorist financing. The office is in constant interaction with payers, supervisory bodies, prosecution and foreign financial intelligence units. Taken into consideration that money laundering is an international and global problem, there have emerged and international organizations involved in anti-money laundering and terrorist financing. One of the payers are banks or the banking sector and its role in the prevention of money laundering is crucial, because these institutions are commonly used in money laundering, and in them the laundered money is the most circulating.