The access to public knowledge, which is the result of the common right to information, is a fundamental issue of modern times. It provides interested parties with information about public affairs. It creates a place for communication and joint determination of issues that are relevant to society as a whole. On this level, it is an institution of social control, which includes the sphere of public procurement. This paper is devoted to determining legally guaranteed forms and methods of its implementation (realization of access to public information, and thus the control process).