ITA and RMI Update: Assessment Criteria for Tin Smelting Companies

ITA and RMI jointly developed the Assessment Criteria for Tin Smelting Companies (v2 2019) with the agreed aim to clarify upstream and downstream understanding of due diligence and a standard aligned with the OECD Guidance.

Following implementation by both organisations of assessments against the Criteria between 2023 and 2025, RMI announced in December 2025 that it will cease conducting assessments against the Criteria effective 1st January 2026. This RMI decision was taken due to limited uptake of assessments against the Criteria, and to focus for tin exclusively on RMI’s own RMAP Tin and Tantalum Standard (2017).

To maintain audit choice for tin smelters, ITA will continue to offer and manage assessments against the Tin Criteria under the Tin Code Assurance Process which has strong uptake.

Both organisations are committed to avoiding duplicated assessments and will actively explore appropriate means to achieve that throughout 2026.

For questions about this update or assessments against the Tin Criteria, please contact: Sonia Marsh (sonia.marsh@internationaltin.org), Daniel Zamora (daniel.zamora@Internationaltin.org).