The subject of research and analysis of this specialist final paper is the topic of money laundering and terrorist financing. In order to define the term money laundering, we can say that it is a matter of undertaking criminal actions for the purpose of concealing funds obtained illegally, with the intention of effectively investing them in the financial or non-financial system. The ultimate goal of the whole process is motivated by the intention to conceal the real source of money, property and other values acquired illegally. In the form of successful realization of the procedure itself, actions are taken which take place in three phases: placement, layering and integration. By terrorism we imply the systematic use of violence with the intention of meeting various, most often political goals. Terrorist activities can be financed in accordance with the law through donations, self-financing or funds obtained from the regular operations of a terrorist organization, and in a faster illegal manner (drug trafficking). The whole process goes through three phases: the first in which the funds are collected, the phase of their transfer and at the end phase in which the collected funds are put into use. Money laundering and terrorist financing procedures are closely linked, but there are significant differences. Terrorism is motivated by the achievement of political, ideological and similar goals, while in the case of money laundering the motive is the acquisition of profit or illegal funds in the form of money, ownership of various assets or other values. We consider the processes of money laundering and terrorist financing to be the most serious forms of crime due to their characteristics and the harmful effects they cause. Accordingly, they can be successfully combated and prevented only by a responsible and targeted approach at both national and international levels.