What document serves as a final piece of evidential matter in an audit?

The management representation letter serves as a pivotal piece of evidential matter in an audit, primarily because it provides written confirmation from management regarding the accuracy and completeness of the information provided to the auditors. This letter is typically obtained at the conclusion of the audit, and it enhances the reliability of the audit evidence gathered. In this document, management affirms that they have provided all relevant information and have not withheld any aspects that could alter the audit’s findings.

Additionally, the management representation letter helps to establish a mutual understanding between the auditors and management, outlining their responsibilities. It is critical because it underscores the reliance the auditors place on management's representations throughout the audit process. Although other documents, such as the audit report, serve important roles in summarizing the audit findings and conclusions, they do not provide the same level of confirmation about the information presented by management as the management representation letter does.