ETH Zurich researchers have found that sustainability auditing on cocoa farms can encourage false reporting when auditors know the targets they are expected to verify. The study, published in Science, examined 407 cocoa farms in Côte d’Ivoire and found that around one in four audit records was manipulated where sustainability targets were known. When targets were hidden from auditors, manipulation fell from 25% to 11%. The results offer a timely warning for cocoa supply chains facing scrutiny over deforestation claims, sustainability labels and corporate disclosures.

Testing The Audit Process

Sustainability monitoring is central to efforts to demonstrate that agricultural supply chains meet environmental commitments. For cocoa businesses, farm-level records can inform assessments of forest protection, certification and sourcing practices, while also feeding into wider reporting requirements.

The ETH Zurich research focused on how the design of an audit affects the information collected. Its findings indicate that auditors’ prior knowledge of the sustainability target can materially affect reported results. Rather than simply identifying compliance, conventional processes may create incentives for records to be altered where the expected outcome is clear.

The research examined cocoa farms in Côte d’Ivoire, a major cocoa-producing country where the integrity of farm-level data has direct relevance for companies seeking to assess deforestation risks in their sourcing networks. The difference recorded between visible and concealed targets points to a practical route for improving the reliability of audit evidence.

A Material Reporting Risk

False reporting can weaken the value of sustainability initiatives intended to give companies, buyers and consumers confidence in cocoa sourcing. Where audit records do not accurately reflect conditions on farms, claims connected to responsible supply chains may rest on incomplete or distorted information.

The study’s findings are particularly relevant as businesses are pressed to substantiate environmental statements with credible evidence. Reliable monitoring is necessary not only for voluntary sustainability labels, but also for corporate reporting systems that depend on information gathered throughout the supply chain.

For organisations purchasing cocoa, the research reinforces the need to examine audit design as closely as audit results. A verified record is only as dependable as the conditions under which it was produced, and the ETH Zurich work identifies target visibility as a factor that can be addressed directly.

Hidden Targets Reduce Manipulation

The central finding is that concealment of sustainability targets reduced the share of manipulated audit records from 25% to 11%. This approach does not remove every risk from the monitoring process, but it presents a relatively straightforward adjustment for programmes seeking more dependable data.

By limiting an auditor’s awareness of the specific sustainability outcome being assessed, monitoring systems may reduce the opportunity or motivation to tailor records to a desired result. That distinction could be valuable for companies and assurance schemes reviewing the way farm information is collected and verified.

The research provides a useful evidence base for moving beyond a narrow focus on whether audits take place. It places attention on the methodology behind those audits, including whether the structure of an assessment unintentionally affects the quality of the data it produces.

Implications For Cocoa Supply Chains

The findings arrive as deforestation-free sourcing becomes an increasingly prominent issue for cocoa supply chains. Companies seeking to demonstrate responsible procurement need robust records from farms, particularly where sustainability commitments depend on land-use and production information gathered at local level.

The study also has implications for sustainability labels and corporate reporting. Both rely on credible, traceable information, and both can be undermined if audit systems reward alignment with known targets rather than objective reporting of conditions.

For programme managers, buyers and certification bodies, the evidence supports closer attention to how audits are commissioned, framed and reviewed. Concealing assessment targets may be a modest procedural change, yet the reported reduction in manipulation suggests it could strengthen confidence in the information underpinning cocoa sustainability claims.

Strengthening Evidence For Action

ETH Zurich’s study offers a constructive reminder that sustainability assurance requires continual scrutiny. Monitoring is not merely an administrative stage in supply chain management, it is the foundation on which environmental claims, improvement programmes and purchasing decisions are made.

With 407 cocoa farms included in the research, the findings give decision-makers a clear signal that audit design deserves greater attention. Better safeguards around target visibility could help make farm records more reliable and allow sustainability initiatives to direct support and accountability where they are most needed.

For the cocoa sector, the opportunity is to build monitoring systems that better reflect conditions on the ground. As companies respond to expectations around deforestation and supply chain transparency, more rigorous auditing methods can help ensure that progress is measured credibly rather than simply reported favourably.