By Dr. Kasole Wasonga, PhD, CPA, GRC & ESG Expert As companies race to showcase their sustainability credentials, one question is rising to the forefront: Who verifies that all these environmental and social claims are actually true? The growing demand for ESG assurance—independent verification of sustainability information—reflects a broader shift in how society evaluates corporate performance. For years, sustainability reporting was largely voluntary. Companies could highlight selective achievements, omit inconvenient details, and measure progress using bespoke methods. Without external scrutiny, ESG reporting lacked the rigor expected of financial statements, leaving investors and the public unsure of what to trust. That era is ending. Regulators around the world are tightening rules and pushing companies to disclose standardized, verifiable sustainability information. The European Union’s new Corporate Sustainability Reporting Directive (CSRD) now requires companies to subject their ESG data to independent assurance, with other jurisdictions moving in the same direction. The message is clear: sustainability reporting must be as reliable as financial reporting. Market forces are reinforcing this shift. Investors increasingly view climate risks, labour issues, and governance failures as financial risks. Banks and rating agencies, too, depend on trustworthy sustainability information to price risk and allocate capital. Without credible data, markets cannot distinguish meaningful commitments from marketing gloss. Assurance provides that confidence. This rising demand is reshaping the assurance profession. Traditional auditors are expanding into ESG services, often collaborating with environmental scientists, engineers, and human-rights experts. Sustainability data is complex, often non-financial, and spans everything from carbon emissions to supply-chain ethics. Assuring it requires more than accounting expertise demands multidisciplinary scrutiny. Inside companies, governance is evolving as well. Boards are assuming greater oversight of ESG disclosures, and internal auditors are testing the systems and controls behind sustainability metrics. ESG assurance is no longer an add-on; it is becoming integral to risk management and strategic decision-making. Ultimately, ESG assurance