In Fraud Detection managers and Chief Ethics Officers began to play a greater role in this system: p prevention and deterrence are provided by the departments that have committed to abide by the minimum measures of the internal control system: updating delegations of authority, principles of segregation of duties, dual sign-off requirements, best practices in managing IT access, etc.; p for fraud detection, the Group Security Department works hand in hand with a network of Fraud Detection managers, one in each Group department, and some 50 Local Security managers appointed by the companies; p investigations are overseen by the Group Security Department, in close collaboration with the Legal Affairs Department, the Audit and the Human Resources Department.