The function of internal audit is concerned with analysis of internal check. The internal audit can look into the duties of every employee. All employees are given jobs on the basis of their abilities. The auditor can test the effectiveness of internal check. The function of internal audit is examining the application of legal requirements.

The accounts are prepared under particular legal frame work. Verification of accuracy is a function of internal audit. The accuracy of accounting books and records can be verified with the help auditing techniques. The audit techniques have inspection, observation, inquiry, confirmation, computation and review. An auditor can check the accuracy by these techniques.