ESG disclosures face legal reckoning as greenwashing claims surge and directors' liabilities grow

In recent years, the sustainability landscape for companies and their boards has shifted dramatically, with Environmental, Social, and Governance (ESG) commitments evolving from aspirational pledges into legally scrutinised corporate disclosures. The consequences of failing to meet ESG promises extend beyond reputational damage to expose directors personally to legal and financial risks, particularly through claims of “greenwashing” , where companies are accused of misleading stakeholders by overstating or misrepresenting their environmental or social achievements.

Historically considered a marketing or corporate social responsibility concern, ESG reporting now demands the same rigour as financial statements. Market participants and regulators alike treat ESG claims as legally binding statements, requiring verifiable, accurate, and defensible data. When companies fall short, the legal repercussions can be swift and significant, turning boardrooms into battlegrounds for litigation. Investors, journalists, NGOs, and regulators have increasingly scrutinised these claims, with false or exaggerated disclosures leading to shareholder lawsuits, regulatory investigations, and a mounting tide of “greenwashing” allegations.

A striking example of such regulatory action occurred in April 2025, when German asset manager DWS, part of Deutsche Bank, was fined €25 million for greenwashing. The firm had claimed to be a leader in ESG investing, a position not supported by its actual practices, prompting this substantial fine. This was not an isolated case; DWS had previously settled a $25 million lawsuit in the United States relating to similar ESG misstatements. These enforcement actions underscore the severe regulatory focus on ensuring ESG claims reflect reality, not rhetoric.

Data from climate governance bodies reveals an alarming trend: since 2016, over 140 lawsuits for greenwashing have been filed, with nearly half emerging in 2023 alone. About 70% of these cases have resulted in findings favourable to plaintiffs, signalling that companies and their directors cannot afford complacency regarding the accuracy of their sustainability disclosures.

Board members are particularly vulnerable because the legal principle underpinning current ESG-related claims places responsibility on directors irrespective of their intent. Whether misstatements arise from ambitious targets, poor data quality, or insufficient oversight, courts increasingly hold directors personally accountable for misleading investors or regulators. This marks a departure from past corporate governance norms, where good intentions often shielded leadership. Now, directors’ and officers’ liability (D&O) insurance policies, originally designed to cover traditional financial management errors, must evolve to address this new ESG risk landscape.

Many traditional D&O policies lack explicit coverage for claims involving sustainability statements, some excluding ESG allegations entirely or imposing low caps on such claims. This gap leaves directors vulnerable to significant out-of-pocket liabilities and defense costs if litigation arises from their ESG disclosures. Industry experts recommend a proactive approach to reviewing and upgrading insurance policies, ideally working with brokers experienced in ESG risks to ensure full protection against emerging liabilities.

As ESG claims span both environmental and social dimensions , from carbon emissions reductions to diversity and ethical sourcing , companies must exercise rigorous due diligence before publicising any sustainability promises. Boards should ask critical questions about data verification, vendor compliance, and legal review before approving ESG reports or claims. Delaying publication when uncertainties persist is a prudent strategy, as defending unsubstantiated claims in court is costly and damaging.

While some companies face litigation, others have successfully defended their ESG marketing. For instance, a U.S. court dismissed a class action against Allbirds Inc., ruling that the company’s claims about having a “low carbon footprint” were unlikely to mislead a reasonable consumer. Such outcomes suggest that the precise framing and substantiation of ESG claims can make a crucial difference between liability and victory.

In parallel, regulatory guidance stresses the importance of timely communication with insurers upon receiving investigations or complaints related to ESG disclosures. Although typical D&O policies cover negligent misrepresentations, intentional wrongdoing is often excluded. Therefore, directors and companies must carefully navigate these waters, striking a balance between transparency, ambition, and legal caution.

Looking ahead, the era of ESG heightens accountability at the highest levels of corporate governance. Investors and the public demand measurable results, not mere ambitions. Directors must safeguard their companies’ ESG integrity by embedding robust verification frameworks and aligning insurance coverage with the expanded nature of their disclosure responsibilities. Failure to do so risks costly litigation and personal liability that can overshadow the environmental and social progress companies strive to achieve.

In summary, as ESG risks move from the periphery to the core of corporate accountability, directors face increasingly stringent exposure. The right preparation, with verified data, sound governance, and comprehensive D&O insurance, will be crucial in navigating this complex environment where greenwashing claims no longer just threaten reputations but also directors’ personal and financial well-being.