Verification of Recycled and Bio-based Plastics, Suggesting control elements to ensure credible claims

This report reviews existing verification and certification systems and assesses how well they provide credible assurance across the plastics value chain. The analysis draws on desktop research, stakeholder interviews, and a systematic review of certification schemes and chain of custody models. It identifies the control elements needed for credibility, such as auditor competence, audit frequency, documentation practices, supplier due diligence, and transparent communication, and evaluates how consistently current systems apply them.