CSR Audit: How we verify your ESG and VS indicators (former VSME)
A methodology compliant with ISO 17029, allowing the reliability, consistency and traceability of the ESG information published to be assessed, in line with the VS (former VSME) frameworks and market practices.
Pre-engagement and defining the perimeter
Before any intervention, we validate the feasibility of the mission and our independence.
We analyze the selected module (Basic or Comprehensive), the consolidation perimeter (entity or group), as well as the nature of the activities in accordance with the applicable reference frameworks.
This step allows defining an intervention framework that is proportionate to the size and maturity of the organization.
Risk analysis and proportionate materiality
We evaluate the processes for collecting and producing ESG data.
The risk analysis focuses on the applicability and reliability of the selected indicators.
It allows identifying the areas at risk of significant anomalies, notably in environmental (energy, emissions) and social (staff, accidents) data, in order to structure an appropriate verification plan.
Review of consistency with the reference frameworks
We analyze the structure of the reporting to assess its alignment with the principles of the Voluntary Standard VS (former VSME).
We verify the relevance, consistency and comprehensibility of the published information, as well as their suitability with sectoral reference frameworks and, where appropriate, with the expectations of financial partners.
Audit of indicators and calculation methods
We conduct detailed tests on the published ESG indicators.
The work includes, among other things:
- the reliability of environmental data (energy, Scope 1 and 2 emissions)
- the consistency of the calculation methods and the factors used
- the accuracy of the social indicators (staff numbers, accidents, ratios)
These checks are carried out using traceable evidence.
Independent review and reliability of the evidence
An independent review is conducted to ensure the quality and adequacy of the evidence collected.
We verify the consistency of the data with the source documents (invoices, registers, internal systems), as well as their relationship with the other information published by the company.
Issuance of the verification statement
At the end of the work, a verification statement is issued, expressing a conclusion regarding the reliability and consistency of the reporting in relation to the chosen framework.
This statement is based exclusively on the evidence available at the time of issuance.

Points to note
Verification of ESG indicators for your EcoVadis assessment
Are you preparing or renewing your EcoVadis assessment?
The quality and traceability of the ESG data used to document your commitments is an essential issue.
POWNESS independently verifies the environmental, social and governance indicators that your company wishes to present as part of its EcoVadis assessment.
Our work may include, among other things, the reliability of the published data, the consistency of the calculation methods, the traceability of the evidence, and the consistency between the indicators reported and the company’s source documents.
Independent verification thus helps to strengthen the reliability of the ESG information presented in your EcoVadis approach.
- GHG emissions, energy and other environmental indicators;
- Staffing, health and safety and social indicators;
- Ethical and governance practices;
- Indicators related to responsible purchasing and the value chain.
To note
POWNESS-OTI can carry out an independent verification of the ESG indicators and the evidence mobilized by the company as part of its EcoVadis approach. The mission focuses on the reliability, consistency, and traceability of the information examined. POWNESS does not assign the EcoVadis rating.
Your ESG Voluntary Standard VS (formerly VSME): the essentials about the CSR audit
The VS (formerly VSME) standard allows non-listed SMEs to structure their sustainability communication in order to meet the growing expectations of their financial partners, investors, and clients. Your reporting is based on these structuring principles:
Modular and proportionate reporting
The VS (formerly VSME) device adapts to the size and maturity of the company through two levels:
- Basic Module : cornerstone of essential indicators
- Comprehensive Module Additional information, notably expected by the financial partners
The information covers environmental, social and governance issues.
Indicators based on applicability
Reporting is based on the publication of relevant indicators in relation to your activity.
The information presented must be consistent with your business model, sector (NACE), and specific issues, and can be supplemented by indicators specific to your strategy.
A voluntary independent verification
The use of verification by an independent third-party body, in accordance with ISO 17029, allows the reliability and consistency of the published information to be assessed.
This approach meets the expectations of transparency and credibility expressed by the economic partners.
To note
The reporting can be presented independently or integrated into the management report.
It is generally prepared on an annual basis, in line with the financial statements, and includes comparative information from the second year onwards.
The growing use of artificial intelligence in data collection and analysis also raises new traceability issues. See our analysis on AI and CSR issues
Do you have a question about the voluntary verification of ESG indicators?
POWNESS-OTI answers your questions about the CSR audit
Your most frequently asked questions about voluntary verification:

Does the VSME standard meet the expectations of banks and large clients?

What is the point of an independent verification in a voluntary framework?

How to process multi-site data in ESG reporting?
Resources
Regulatory framework and criteria for voluntary verification
The voluntary verification work is carried out based on a structured technical framework, allowing the reliability and consistency of SMEs’ sustainability reporting to be assessed in relation to applicable benchmarks and the expectations of stakeholders.
Applicable reference framework
The publication of voluntary ESG information is part of a structured European framework, in line with the expectations of financial and commercial partners.
- EU VSME recommendations of July 30, 2025
- Guidelines from EFRAG for «SMEs and Sustainability Reporting»
- Recommendations of the European Banking Authority (EBA) related to ESG risks
- Regulation (EU) 2019/2088 (SFDR) from November 27, 2019
- Climate criteria and exclusions associated with European reference frameworks
Benchmarks and reporting standards
The work is based on the VSME standard and its associated frameworks in order to assess the relevance and consistency of the published information.
- Standard VSME (Basic and Comprehensive modules) in the CSR portal
- Technical guidance from EFRAG
- GHG Protocol (Corporate Standard) – emission calculation (Scopes 1, 2, 3)
- Sectoral and thematic benchmarks for sustainability
Reference points for verification and professional doctrine
The mission is carried out in accordance with the requirements applicable to independent third-party organizations.
- ISO/IEC 17029 standard
- ISO 14064-3 (verification of GHG data)
- Principles of independence and ethics applicable to verification
- Insurance practices adapted to the maturity level of the arrangements
