The field of financial investigation in contemporary Czech criminalistic and security theory and practice is an area that continues to require proactive action and attention; however, in the author's view, it also deserves to be firmly anchored within the methods of criminalistic tactics. In this article, the author proposes and justifies the firm establishment of the 'Financial Investigation' method within Czech criminalistics, presenting this vision to the international professional community. These assertions are grounded in the author's research, pedagogical, and practical experience within the field, with an emphasis extending beyond pre-trial criminal proceedings. The criminalistic definition of the Financial Investigation method encompasses appropriate procedures, tools, and tactical operations for establishing the asset profile of the offender and their associates, as well as for the seizure of illicit gains, instrumentalities, equivalent values, and the claims of injured parties and crime victims.