Internal audit also plays a vital role in internal control mechanism in organizations. The directors and management of an organization adopt internal control process, which provides assurance about the attainment of the organization’s objectives regarding operations, financial reporting and compliance with the regulations (COSO Report, 1992). External auditing standards (for example: AUS, 402 and ISA, 400) shows that the control environment can be reinforce by using effective internal audit function by: a). Assessing of the internal control structure of a firm; and b).