The relevance of the research topic is caused by the urgent need to resolve issues that hinder the work of the state customer, especially aspects that allow to implement corruption schemes in the state order, getting rid of which is of state importance. The authors understand the system of state and municipal procurement simultaneously as a set of its participants and their actions according to the rules established by the regulator. They point to the objectively existing specifics of the regulation of the procurement system and assign an important place to the issue of compliance with the requirements of the law in relation to it in assessing the effectiveness of its functioning. The article discusses the main identified patterns of offenses in the field of procurement, however, it is stated that it is impossible to draw up a complete analysis of them, since not all crimes are detected, and the methods of their commission are constantly changing. The results of offenses in the field of state and municipal purchases, including corruption, can be: the quality of purchased goods, works, services; cost overruns and ineffective use of budget funds; delaying the deadlines for order execution; the emergence of the need to re-conduct the tender procedures, which also delays the final deadlines for the execution of the necessary actions; opposition to natural competitive processes in the markets. The authors analyze the recommended methods of crime prevention, and argue that organizational and administrative methods may be preferable to legal ones. The article also analyzes the causes of risks in the field of municipal procurement and suggests the ways to minimize them.