Corporate Sustainability Assurance Claims

1. Meaning and Definition

Corporate Sustainability Assurance Claims are legal or regulatory claims arising when a company, its directors, officers, auditors, assurance providers, or other responsible persons make, publish, verify, or rely upon sustainability-related information that is false, misleading, incomplete, materially inaccurate, unsupported, or inadequately assured.

Sustainability information may concern:

• greenhouse-gas emissions;
• carbon footprint and net-zero claims;
• renewable-energy use;
• water consumption;
• waste management;
• biodiversity;
• pollution;
• environmental compliance;
• labour and human-rights practices;
• health and safety;
• diversity and inclusion;
• supply-chain practices;
• corporate social responsibility (CSR);
• ESG performance;
• climate-risk disclosures; and
• sustainability targets and commitments.

In India, sustainability assurance has become increasingly important because SEBI's BRSR framework seeks greater credibility for ESG information. SEBI introduced assurance requirements for specified BRSR Core indicators, while also addressing concerns about greenwashing and the reliability of sustainability disclosures.

Thus, a sustainability assurance claim can arise where stakeholders contend that the sustainability information was not reliable, the company failed to exercise adequate verification, or the assurance process did not provide the level of confidence represented to investors and the public.

2. Nature of Corporate Sustainability Assurance

Sustainability assurance is different from ordinary financial auditing.

A financial audit principally examines historical financial information. Sustainability assurance examines non-financial information such as emissions, energy consumption, water usage, social indicators, governance metrics and other ESG information.

For example, a company may report:

"Our Scope 1 and Scope 2 emissions decreased by 40%."

An assurance engagement may examine whether:

1. the emissions data was correctly collected;
2. the reporting boundary was properly defined;
3. the methodology was appropriate;
4. underlying records support the figures;
5. calculations were accurate;
6. internal controls were effective; and
7. the disclosed information contains material misstatements.

A current Indian example illustrates the nature of such engagements: a 2026 sustainability assurance statement concerning Reliance Industries described management's responsibility for sustainability information and the assurance practitioner's responsibility to obtain evidence concerning material misstatement, including risks arising from fraud or error.

3. Legal Framework in India

Corporate sustainability assurance claims can arise from several overlapping legal regimes.

A. Companies Act, 2013

Important provisions include:

Section 134 — Board's Report

The Board's Report contains important corporate disclosures and management responsibilities.

Section 166 — Duties of Directors

Directors must act in good faith in the interests of the company, its members, employees, shareholders, community and protection of the environment.

Section 135 — CSR

Section 135 establishes statutory CSR obligations for qualifying companies.

The importance of environmental responsibility within the CSR framework was significantly reinforced by the Supreme Court's 2025 decision in M.K. Ranjitsinh v Union of India, where the Court stated that corporate social responsibility inherently includes corporate environmental responsibility.

B. SEBI's BRSR Framework

For listed entities, the Business Responsibility and Sustainability Report (BRSR) is an important source of sustainability information.

SEBI's BRSR Core framework introduced a phased assurance mechanism. The original glide path covered:

SEBI subsequently modified the terminology and approach concerning "assurance" and "assessment", so the precise requirement applicable to a particular financial year must be checked against the current SEBI regulations/circulars.

4. What Is a Sustainability Assurance Claim?

A claim may arise where there is an allegation that:

1. False sustainability information

The company reports environmental or social performance that is factually incorrect.

2. Greenwashing

The company presents itself as environmentally responsible while its actual operations do not support the claim.

3. Unsupported ESG claims

The company makes statements such as:

• "100% sustainable";
• "carbon neutral";
• "net zero";
• "zero environmental impact";

without sufficient evidence.

4. Misstatement of emissions

The company underreports greenhouse-gas emissions or uses an inappropriate reporting boundary.

5. Inadequate verification

The company claims that sustainability information has been "assured" even though the assurance exercise was materially narrower than stakeholders would reasonably understand.

6. Supply-chain misrepresentation

A company reports sustainable sourcing while failing to investigate serious environmental or labour problems within its supply chain.

7. Failure to disclose material environmental risks

A company may fail to disclose:

• regulatory proceedings;
• pollution;
• environmental penalties;
• climate-related risks;
• contaminated sites;
• environmental liabilities; or
• material sustainability incidents.

8. Misleading investors

Where sustainability information is material to investment decisions, inaccurate ESG information may potentially engage securities-law consequences.

5. Elements of a Sustainability Assurance Claim

A claimant normally needs to establish the relevant legal duty and breach.

Element 1 — Existence of a duty

The duty may arise from:

• statute;
• SEBI regulations;
• listing obligations;
• contractual commitments;
• fiduciary duties;
• professional standards;
• environmental law;
• consumer law;
• tort principles; or
• representations made to investors.

Element 2 — Sustainability representation

There must generally be an identifiable statement, report, disclosure, representation or assurance.

Element 3 — Material inaccuracy or deficiency

The information must be false, misleading, incomplete, unsupported or otherwise materially deficient.

Element 4 — Responsibility

Responsibility may potentially rest upon:

• company;
• directors;
• key managerial personnel;
• compliance officers;
• sustainability officers;
• persons responsible for ESG reporting;
• auditors;
• independent assurance practitioners; or
• other persons responsible for the representation.

Liability is not automatically imposed on every director merely because of office. Responsibility depends upon the applicable statute, role, knowledge, participation and evidence.

Element 5 — Reliance or regulatory consequence

Depending upon the cause of action, the claimant may need to demonstrate:

• investor reliance;
• financial loss;
• environmental damage;
• regulatory contravention;
• misleading conduct; or
• another legally recognized injury.

6. Greenwashing as a Sustainability Assurance Claim

Greenwashing is one of the most important modern forms of sustainability-related dispute.

It occurs where a company creates an exaggerated or misleading impression concerning its environmental performance.

Examples include:

• overstating renewable-energy use;
• understating emissions;
• presenting a product as "green" without adequate evidence;
• claiming carbon neutrality without credible offsets;
• selectively publishing favourable ESG data;
• concealing environmental violations; or
• presenting future aspirations as achieved results.

Assurance mechanisms are intended to reduce precisely this type of credibility problem. SEBI has expressly recognized concerns about greenwashing and the need for greater credibility of BRSR disclosures.

7. Corporate Environmental Assurance

Sustainability assurance is closely connected with environmental compliance.

A company cannot necessarily rely upon an ESG report to avoid substantive environmental liability.

For example, if an industrial company reports excellent environmental performance but is actually discharging pollutants in violation of law, the sustainability report does not immunize it from environmental liability.

The Supreme Court has repeatedly treated environmental protection as an enforceable legal concern rather than merely voluntary corporate philanthropy.

8. Relationship Between Assurance and Corporate Governance

Sustainability assurance is increasingly part of corporate governance.

The Board should establish systems for:

• identifying ESG risks;
• collecting reliable data;
• assigning responsibility;
• maintaining supporting documentation;
• internal verification;
• risk management;
• independent assurance;
• correcting errors;
• monitoring suppliers; and
• reporting material sustainability risks.

A sustainability statement therefore cannot simply be treated as a public-relations document where it forms part of regulated corporate reporting.

The Supreme Court's corporate-governance jurisprudence emphasizes that corporate management must operate within the statutory and constitutional framework governing corporate decision-making.

9. Major Types of Sustainability Assurance Claims

A. Investor Claims

Investors may allege that misleading sustainability information affected investment decisions.

B. Shareholder Claims

Shareholders may challenge:

• misleading disclosures;
• inadequate governance;
• failure to comply with statutory duties;
• misuse of corporate resources;
• environmental risks affecting company value.

C. Regulatory Claims

SEBI or other regulators may take action for violations of applicable disclosure requirements.

D. Environmental Claims

Pollution or ecological damage may lead to:

• compensation;
• restoration;
• remediation;
• environmental penalties; or
• directions to discontinue unlawful activities.

E. Consumer Claims

False environmental claims concerning products may potentially generate consumer-law consequences.

F. Director/Fiduciary Claims

Where directors knowingly participate in misleading sustainability disclosures or fail to discharge applicable duties, corporate-law consequences may arise.

G. Assurance-Provider Claims

An assurance provider may face professional or regulatory consequences where its work falls below the applicable assurance requirements.

10. Standard of Assurance

An important distinction is between limited assurance and reasonable assurance.

Limited Assurance

Provides a lower level of assurance and generally involves less extensive procedures.

Reasonable Assurance

Provides a higher level of assurance and requires more extensive evidence-gathering and risk assessment.

The objective is not absolute certainty. Sustainability assurance has inherent limitations, particularly because ESG information may involve:

• estimates;
• assumptions;
• complex supply chains;
• evolving methodologies;
• incomplete data;
• future targets; and
• difficult-to-measure environmental impacts.

Therefore, an assurance statement should clearly identify what information was covered and what was excluded.

The 2026 Reliance assurance statement, for example, expressly identified the sustainability information within the assurance scope and excluded other BRSR information from the opinion.

11. Corporate Sustainability Assurance and Directors

Directors have an important governance role because sustainability information may ultimately be incorporated into corporate reporting.

A director may face greater exposure where evidence establishes:

• participation in preparing false disclosures;
• knowledge of material inaccuracies;
• deliberate concealment;
• failure to respond to known environmental risks;
• misleading investors;
• improper certification; or
• failure to maintain appropriate systems.

However, mere designation as a director should not automatically establish personal liability. Indian securities jurisprudence recognizes the importance of examining an individual's actual role and responsibility.

12. Six Important Case Laws

1. M.K. Ranjitsinh v Union of India & Others

Supreme Court of India, 19 December 2025, 2025 INSC 1472

This is particularly important for modern corporate sustainability.

The Supreme Court considered the relationship between renewable-energy development, biodiversity and corporate responsibility. The Court stated that Corporate Social Responsibility inherently includes Corporate Environmental Responsibility and emphasized that companies cannot treat social responsibility as independent from environmental protection.

Principle

Corporate sustainability is not merely a public-relations exercise. Environmental responsibility can form part of the broader legal conception of corporate responsibility.

Relevance: Very high for corporate sustainability assurance claims.

2. Vellore Citizens' Welfare Forum v Union of India

(1996) 5 SCC 647

The Supreme Court recognized the precautionary principle and polluter-pays principle as essential features of sustainable development.

The Court emphasized that environmental protection must be integrated into development decisions.

Principle

A corporation engaging in potentially environmentally harmful activities cannot simply rely upon uncertainty or lack of complete scientific evidence to avoid environmental responsibility.

Relevance: Provides the substantive environmental-law foundation against which corporate sustainability claims can be tested.

3. Indian Council for Enviro-Legal Action v Union of India

(1996) 3 SCC 212

The Supreme Court applied the polluter-pays principle and held that persons carrying on hazardous activities can be liable for environmental harm.

The principle extends beyond compensation to restoration of damaged ecology.

Principle

A company cannot use sustainability reporting or an assurance statement as a substitute for actual environmental compliance.

Relevance: Particularly important where a company reports sustainability while its operations cause environmental damage.

4. M.C. Mehta v Union of India — Kamal Nath Case

(1997) 1 SCC 388

The Supreme Court applied the public trust doctrine, precautionary principle and polluter-pays approach in relation to environmental protection.

The Court emphasized that environmental resources cannot simply be treated as unrestricted commercial assets.

Principle

Corporate activities involving natural resources remain subject to public environmental obligations.

Relevance: Sustainability claims concerning natural resources, land, water and ecological impacts must be consistent with substantive environmental duties.

5. Alembic Pharmaceuticals Ltd v Rohit Prajapati

(2020) 17 SCC 157

The Supreme Court rejected the concept of retrospective or ex-post-facto environmental clearance in the circumstances before it.

The Court emphasized that environmental assessment must occur before environmentally significant activity begins, because prior assessment is an important component of the precautionary principle. It also imposed substantial environmental compensation for non-compliance.

Principle

Environmental compliance cannot be retrospectively manufactured merely to legitimize an activity that should have been assessed beforehand.

Relevance: Important where sustainability reports attempt to portray environmental compliance after the fact.

6. Hanuman Laxman Aroskar v Union of India

(2019) SCC OnLine SC 441

The Supreme Court examined the environmental-clearance process for the Mopa airport project.

The Court emphasized the importance of a legally compliant environmental decision-making process and scrutinized whether relevant environmental considerations had properly been taken into account.

Principle

Environmental decision-making must be transparent, reasoned and based upon relevant information.

Relevance: Supports the proposition that credible sustainability governance requires reliable underlying information rather than merely favourable conclusions.

7. Tata Consultancy Services Ltd v Cyrus Investments Pvt Ltd

(2021) 9 SCC 449

Although primarily a corporate-governance case rather than an ESG-assurance case, the judgment is important for understanding the governance dimension of sustainability reporting.

The Supreme Court examined the relationship between corporate management, directors, shareholders and statutory governance mechanisms.

Principle

Corporate governance disputes must be assessed through the statutory framework governing corporate decision-making rather than through generalized allegations of unfairness.

Relevance: Sustainability reporting responsibilities must similarly be placed within defined corporate governance and statutory duties.

13. Additional Relevant Environmental Case

M.C. Mehta v Union of India — Ganga Pollution Case

(1988) 1 SCC 471

The Supreme Court addressed industrial pollution and emphasized the obligation of industries to comply with environmental requirements.

Principle

Economic activity does not override the obligation to prevent environmental pollution.

Relevance: Particularly significant where a company's sustainability disclosures concern pollution-control performance.

14. Remedies for Sustainability Assurance Claims

Depending upon the legal basis of the claim, remedies can include:

1. Compensation

For environmental or other legally recognized loss.

2. Environmental restoration

Polluter-pays principles can require expenditure on ecological restoration.

3. Regulatory penalties

Applicable securities, corporate or environmental regulators may impose penalties.

4. Corrective disclosure

A company may be required to correct misleading information.

5. Injunction

Courts may restrain continuing unlawful conduct.

6. Governance directions

Authorities or tribunals may require improvements in internal systems.

7. Director liability

Where statutory requirements are satisfied, responsible officers may face personal consequences.

8. Assurance-provider consequences

Professional disciplinary or regulatory action may arise where applicable standards have been violated.

9. Shareholder remedies

Depending upon the circumstances, shareholders may pursue remedies under corporate law, including oppression/mismanagement or class-action mechanisms.

10. Environmental compensation

Where environmental damage is established, compensation may be directed toward remediation rather than merely payment to individual victims.

15. Defences Available to Companies

A company facing a sustainability assurance claim may argue that:

• the disclosure was accurate;
• the information was prepared according to the applicable framework;
• the allegedly inaccurate information was immaterial;
• the assurance scope did not cover the disputed information;
• the statement was clearly identified as an aspiration or future target;
• reasonable internal controls existed;
• the alleged error was not known;
• the individual defendant had no responsibility for the disclosure;
• the claim is outside the relevant statutory regime; or
• the claimant cannot establish loss or another required element.

However, these arguments become weaker where the company knowingly publishes unsupported or materially misleading sustainability information.

16. Corporate Sustainability Assurance vs Financial Audit

17. Importance of Internal Controls

A strong sustainability assurance system should contain:

1. clearly defined ESG responsibilities;
2. documented reporting boundaries;
3. standardized data collection;
4. evidence-retention procedures;
5. emissions calculation controls;
6. supplier-data verification;
7. internal review;
8. Board-level oversight;
9. independent assurance; and
10. procedures for correcting errors.

Without reliable internal controls, an external assurance statement may have difficulty providing meaningful confidence.

18. Greenwashing and Corporate Liability

Greenwashing becomes particularly serious where:

False information → public sustainability claim → investor/consumer reliance → economic or regulatory consequence.

For example:

A company reports a 50% reduction in emissions, but internal records show that the company excluded a major facility from the reporting boundary without adequate disclosure.

Potential issues could include:

• misleading sustainability disclosure;
• inadequate internal controls;
• governance failure;
• securities-law implications;
• consumer-law implications;
• regulatory investigation; and
• possible responsibility of persons involved in preparing or approving the disclosure.

19. Role of Assurance Providers

An assurance provider should ordinarily examine matters such as:

• reliability of source data;
• methodology;
• reporting boundaries;
• calculations;
• evidence;
• internal controls;
• materiality;
• risk of material misstatement;
• fraud/error risks;
• management representations; and
• consistency between reported information and underlying evidence.

But assurance is not necessarily a guarantee that every statement in an entire sustainability report is true.

The scope of the engagement is critical.

20. Important Legal Principle

A crucial distinction should be maintained:

Sustainability assurance does not eliminate substantive corporate or environmental liability.

A company cannot say:

"Our ESG report was assured, therefore we cannot be liable for environmental harm."

The assurance statement concerns the information and scope covered by the engagement. It does not automatically immunize the company from:

• environmental statutes;
• pollution liability;
• contractual liability;
• securities law;
• consumer law;
• fiduciary duties;
• CSR obligations; or
• other applicable legal requirements.

This distinction is strongly consistent with Indian environmental jurisprudence, which treats sustainable development, precaution and polluter-pays principles as substantive legal principles.

21. Future Development of Sustainability Assurance Claims

The area is likely to become increasingly important because corporate sustainability information is becoming relevant to:

• investment decisions;
• ESG ratings;
• green finance;
• sustainability-linked loans;
• carbon markets;
• climate-risk management;
• supply-chain decisions;
• government procurement;
• consumer choices; and
• corporate valuation.

The legal significance of sustainability information therefore increasingly moves from voluntary corporate communication toward regulated corporate information.

22. Conclusion

Corporate Sustainability Assurance Claims represent the legal intersection of corporate governance, ESG disclosure, environmental law, securities regulation, auditing/assurance and stakeholder protection.

In India, the developing framework can be understood through three connected principles:

1. Companies must provide credible and appropriately supported sustainability information.
2. Boards and responsible officers must maintain appropriate governance and control systems.
3. Assurance of sustainability information does not replace substantive environmental and social legal obligations.

The Supreme Court's decisions in Vellore Citizens' Welfare Forum, Indian Council for Enviro-Legal Action, Alembic Pharmaceuticals, Hanuman Laxman Aroskar, and particularly the 2025 M.K. Ranjitsinh judgment demonstrate the increasing legal importance of environmental responsibility in corporate activity. The 2025 Ranjitsinh judgment is especially significant because it expressly connected CSR with Corporate Environmental Responsibility.

Accordingly, a modern corporate sustainability assurance claim is not merely a dispute about an ESG report. It may become a corporate governance, securities, environmental, consumer, fiduciary or regulatory claim, depending upon the facts and the legal duty involved.