Supplier to Zero is an assessment where suppliers are evaluated on the effectiveness of their implementation of ZDHC guidelines & solutions. This can be taken by Signatory or non-signatory suppliers. There are three levels, Level 1/2/3.

• Level 1: An evaluation is based on self-assessment.
• Level 2: A self-assessment, where the answers are verified by a third-party assessor (desktop review).
• Level 3: A self-assessment, where the answers are verified via a third-party assessor’s on-site visit.