engaging with suppliers with the aim of continuously improving the completeness and quality of information provided, particularly in relation to the identification of smelters and refiners and the country of origin of As outlined in the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, the internationally recognised standard on which Vodafone’s system is based, we support an industry initiative that audits smelters’ and refiners’ due diligence activities.