The main objective of auditing is the verification of accounting data besides determining the accuracy and reliability of the accounting and financial statements and reports of any business enterprise. Verification does not exactly mean that there is certainty in connection with the data and financial statements being audited. It means seeking for sufficient evidence to satisfy oneself as the auditor that the statements and accounts show true and fair view. Sufficient evidence depends on the experience, knowledge and expertise of the auditor. The auditor is required to obtain evidential material to support the accounts and financial statements. The evidence available to the auditor varies in reliability, and the auditor must consistently be aware of this fact.