It describes and analyzes the application of the State's liability regime as set forth in Article 90 of the Political Constitution; it also describes the types of imputation, which falls into another thesis due to the special importance it gives to the State's liability regime. In order to develop the contents, a presentation of concepts and definitions is made to differentiate the different existing institutions, thus becoming a sort of encyclopedia or dictionary. However, many definitions not only describe, but also seek to understand the different meanings and their impact on the community, which leads to a hermeneutic approach. The Colombian State has privatized public services inherent to it with the justification of improving the quality of service provision, in accordance with liberal models that seek to reduce the direct provision of the State in matters of economic development, preserving inspection, control and surveillance functions.