The theme of this treatise are professional insurance fraud from the perspective of past and present. It brings the history of insurance fraud, their characteristics and the defi nition in the law and beyond, examines the causes and eff ects of insurance fraud to the insurance company and its clients. The paper includes a list of ways you can fi ght with insurance fraud and also look at modern methods and prevention technologies. An integral part of this type of contribution is also criminal law off enses related to insurance fraud. Content are also recommendations for preventive action of insurers against insurance fraud. Work provides insight on current statistics of insurance fraud in the Czech Republic.