Public procurements are part of a complex process by which the functionality of public authorities, creation of a competitive business environment, and promotion of public funds efficient use practices should be insured. At global level, public procurement represent from 10 to 25% of the GDP , on average, and almost 1/3 of the national state budgets, including the biggest part of government expenditures. The huge amount of funds involved in this process and the close interactions between public and private sectors make public procurements extremely vulnerable to corruption. Up to one forth (1/4) of the budget for public procurement is estimated to be extracted through corruption, globally.