Sedex Certification in India. SEDEX -Supplier Ethical Data Exchange. Sedex is a membership organization for businesses who are focused on a continuous improvement of the ethical performance of their supply chains. Sedex is the largest collaborative platform for sharing ethical supply chain data. It is an innovative and extremely effective supply chain management solution, helping brands & companies to reduce risk, protect brand reputation and improve supply chain practices. The Tool and Standard used by SEDEX is named SMETA – Sedex Members Ethical Trade Audit. The SMETA Standard is built on four pillars. All members of Sedex successfully improve their supply chain performance using SMETA Standard.