Audit evidence refers to the information collected by auditors to support their audit (Also see Factors Influencing Audit Risk Assessment) opinion. It is essential in determining whether financial statements are accurate and fairly presented. The reliability and sufficiency of audit evidence directly affect the quality of the audit process. Professional firms and an accounting firm in Singapore often emphasize strong documentation practices to ensure reliable audit evidence.
Audit evidence can come from different sources, including internal documents, external confirmations, physical inspection, and analytical procedures (Also see An Overview of Accounting Procedures) . External evidence, such as bank confirmations, is generally considered more reliable than internal records.
The reliability of audit evidence depends on its source and nature. Evidence obtained directly by auditors (Also see How Auditors Evaluate Tax Risks) is usually more reliable than evidence provided by the client. Similarly, written evidence is considered more reliable than verbal explanations.
Another important factor is sufficiency. Auditors must collect enough evidence to support their conclusions. If evidence is insufficient, audit opinions may be incomplete or inaccurate. Audit evidence is the foundation of the auditing process, ensuring that financial statements (Also see Correcting Errors in Financial Statements) are supported by credible and verifiable information.