In this lesson, the key aspects of required audit documentation are discussed, emphasizing its purpose and the various items that must be included. While not an exhaustive list, the lesson covers the importance of written engagement letters, audit plans, critical audit correspondence, representation letters, reconciliation of accounting records to financial statements, findings that could result in a modification, auditor's assessment of the risk of material misstatement, description of audit procedures to be performed, and justifications for any departures from the applicable reporting framework. The lesson also offers insights into the significance of documentation in providing proof of work for reasonable assurance and highlights the importance of showing the work performed during the audit. Overall, this lesson emphasizes the key elements that must be present in documentation to support audit reports and opinions in accordance with generally accepted auditing standards.