SEDEX CERTIFICATION IN INDIA. Sedex, the Supplier Ethical Data Exchange, is a membership organisation for businesses committed to continuous improvement of the ethical performance of their supply chains. Companies join Sedex in order to use the Sedex web-based system, participate in Sedex governance , participate in working groups , network and engage with other Sedex members , utilise Sedex value-added services. Sedex enables member companies to efficiently manage the ethical and responsible practices of their global supply chains, generating transparency through the provision of a data exchange.