Self-assessed reported impact should be externally audited for several reasons: Credibility: External audits validate the accuracy of the reported data, enhancing trust among stakeholders, including customers, investors, and partners. Transparency: Auditing ensures transparency in reporting, which is crucial for building trust & for aiming to end "greenwashing". Accountability: It holds the reporting organization accountable for its claims, ensuring that the reported social and ecological impacts are real and not exaggerated. Compliance: Audits check for compliance with relevant standards and regulations, important for maintaining legal and ethical standards. Improvement: External audits can provide insights and recommendations for improving impact measurement and reporting processes.