Audits, Assessments & Due DiligenceAudits, Assessments & Due Diligence

Third-Party Audits


Remote and Desk Review Verification
TDi will work with you to conduct a desk review of your traceability and ESG practices against agreed requirements. We can include desktop diligence and public report and allegation analysis using our TDiSearch360 software and methodology.

Onsite Audits and Assessments
We are an approved auditor against key sustainability and responsible sourcing standards for industry programs and trusted partners, including:

RMI RMAP audits

TDi is an approved auditor to conduct RMAP audits worldwide.

Equitable Origin audits

TDi staff are approved assessors to conduct audits against EO100 Standard and the EO100 for Natural Gas.

Responsible Commodities assessments

TDi staff are approved lead assessors for Responsible Commodities assessments.

LME assessments and audits

TDi staff are approved LME Track A alignment assessors and LME Track B auditors

MAC TSM protocols auditor

MAC TSM protocols

TDi staff are approved to assess the Mining Association of Canada (MAC) Towards Sustainable Mining (TSM) Protocols

The Copper Mark is audited by TDi Sustainability

The Copper Mark audits and reviews

TDi is approved to provide audits and independent reviews against The Copper Mark’s assurance system, worldwide.

The Nickel Mark is audited by TDi Sustainability

The Nickel Mark audits and reviews

TDi is approved to provide audits and independent reviews against The Nickel Mark’s assurance system, worldwide.

The Zinc Mark is audited by TDi Sustainability

The Zinc Mark audits and reviews

TDi is approved to provide audits and independent reviews against The Zinc Mark’s assurance system, worldwide.

The Molybdenum Mark is audited by TDi Sustainability

The Molybdenum Mark audits and reviews

TDi is approved to provide audits and independent reviews against The Molybdenum Mark’s assurance system, worldwide.

Second-Party Audits and Assessments

As experienced second-party auditors, TDi conducts audits on behalf of our clients to evaluate the performance, compliance, and quality of their suppliers, partners, or service providers. We carry out audits and assessments against customer-specific requirements, supplier codes of conduct, and sustainability standards and frameworks such as:

• Subcontractor Audits

• International Finance Corporation/IFC Performance Standards

• Customer-Specific Requirements and Supplier Codes of Conduct

• OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected & High-Risk Areas

Local staff

We have a wide network of our auditors based around the globe to ensure that you get the support you need from a skilled team familiar with local context and specifics.

Continuous Improvement and Capacity building


Stay ahead of the curve and on top of ever-changing responsible-sourcing requirements by taking advantage of our services which include:

  • Continuous improvement support: Following the assessments, we’ll work with you to help prioritise and implement improvement actions needed to close the gaps identified during the assessments.
  • Building capacity of your staff: We’ll work with you between audits to ensure your knowledge stays current, complete and relevant.