Historically recent phenomena such as the crisis of the Democratic State and globalization have promoted important changes in the forms of participation of civil society. Despite the decline in trust of governments and institutions, the support to democratic ideals has grown, allowing the emergence of citizens willing to demand more responsibility from governors, which can be designated as accountability. Therefore, along with the traditional mechanisms of power suppression, such as the system of checks and balances, social control arises. This, when used together with the monitoring exercised by public inspection agencies, is defined as horizontal accountability activated by civil society, in which citizens and institutions gather efforts in order to promote a more effective charge of responsibility from public agents and politicians in case of misconducts. This phenomenon has presented a growing expansion in Latin America and particularly in Brazil, especially after the process of democratization occurred in the end of the twentieth century and with the promulgation of the Federal Constitution in 1988. Among the several mechanisms of accountability created by the Main Text, one which can be pointed out in the area of public expenditure is the denunciation of illegalities and irregularities to the Courts of Account. Since the creation of the institute, these entities have performed a growing movement of opening to civil society, intensified by the Fiscal Responsibility Law. However, for the expansion of the partnership among these actors, some challenges must be overcome: the Courts of Account shall privilege independence, transparency, agility and educational approach, whereas civil society still needs to face accountability as a fundamental demand in a democratic republican country.