last ten years, the collapse of several big companies of good reputation in their field of activity, whose reports were audited by the largest auditing firms that issued reports which confirmed that statements showed financial situation and profitability without any reservations; lead to higher focus of all related parties on the reasons of their collapse. The most important tools of control are the functions of internal auditing defined by the Institute of Internal Auditors (IIA) in 1999 as: “Independent confirmation and designed consulting activity to add value and to improve company operations which help the company in achieving its goals by introducing a well-organized systematic method to evaluate and improve the effectiveness of the operations of managing risks, observation and governing of the entity”.

The most important reasons of modern developments in internal auditing can be summarized as follows:

1. Continuous attempts to overcome aspects of deficiency of internal auditor independence as being an employee in the company.

2. The increased need for self-evaluation of internal auditing with the participation of all company workers.

3. The emergence of the concept of company risk management and the need of dealing with these activities.

4. The emergence of the concept of corporate governance and the need of monitoring the company’s internal performance to tighten control inside the company to preserve stability and consistency.

5. The increase of international operations range, tied to sophisticated information technology and to the increase of E- commerce amount.

As a result, the internal auditing adopted new function which is risks evaluation, governing and assuring control systems to assist the company in enhancing its operations and consulting activities through taking a leading role in company governing process and in the field of risk management and observation.

Most professional reports issued by professional organizations in the field accounting and auditing, performed the studies focused on weakened health of companies in many countries. They also studied cheating and manipulating cases in financial reports and observed corporate governance of sampled entities. Those rep