Legal aspects of the fight against tax evasion The aim of this thesis is an analysis of selected institutes fighting against tax evasion. Furthermore, an analysis of reasons for their implementation, their purpose and the problems associated with them. Also the current impact of tools that have been part of Czech law for long is reviewed. The thesis is divided into 8 chapters. The first chapter deals with basic concepts, such as a tax, its functions and principles. The second chapter discusses what is tax evasion, the issue of defying what is still considered a tax evasion and what not, and also highlights the socio- economic origin of tax evasion. Furthermore, the chapter summarizes effective and necessary tools in fight against tax evasio...