Modern banks have a specific role and a whole range of functions of paramount importance, as financial institutions for granting loans, creating loans, mobilizing savings and economic development. In the financial sector, there is a growing number of people who are using increasingly innovative and creative ways of targeting all perceived weaknesses in banks and credit approval systems. The persons committing fraud have become increasingly sophisticated, which means that measures to prevent fraud must be constantly developed to ensure that they are able to deal with the threat. The fight against fraud is crucial for financial services institutions. This article aims not only to briefly describe the role of internal control and internal audit in detecting possible fraud in banks, as profit-oriented organizations in today's complex and highly changing business environment, but also to point out the advantages they have in the more efficient management of bank activities.