Assurance you can trust: How RSB raises the bar in sustainability certification
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In the complex landscape of sustainability certification, credibility and trust are everything. At the Roundtable on Sustainable Biomaterials (RSB), we believe that integrity must be at the core of certification — not just in principle, but in practice.
That’s why RSB is so proud of the rigour of our assurance system, aligned with the ISEAL Code of Good Practice, and grounded in the concept of reasonable assurance. This level of scrutiny means that every audit delivers confidence — not just compliance.
But RSB goes further.
We’ve integrated an independent, third-party technical Oversight Body into our certification system: Sajoma Climate. While Certification Bodies (CBs) audit Participating Operators, Sajoma reviews the performance of CBs themselves at a technical level. This additional layer of oversight brings depth, transparency, and continuous learning into our assurance system.
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What makes RSB’s approach so effective?
This approach to oversight and assurance plays a vital role in ensuring consistency, technical quality, and impartiality across its system. Key elements include:
- Reasonable assurance, not limited assurance: Unlike the more common limited assurance model, which relies on quick reviews and surface-level checks, RSB requires reasonable assurance, a deeper level of audit scrutiny that demands verifiable evidence and thorough on-site evaluation. This increases confidence in audit results and ensures that sustainability claims are genuinely backed by performance on the ground.
- A deeper level of technical oversight: Unlike conventional oversight, which often relies on infrequent reviews or surface-level evaluations, RSB’s technical oversight system goes deeper — combining risk-based audit reviews, independent technical analysis, and ongoing calibration across CBs. This proactive approach not only identifies discrepancies and reduces vulnerabilities, but also drives consistent interpretation of the standard, fosters continuous improvement, and builds stakeholder trust through transparency and accountability.
- Open grievance mechanism: Anyone can raise a concern via RSB’s publicly accessible grievance mechanism, ensuring accountability and responsiveness.
- Public stakeholder consultations: All new certification applications are subject to a two-week public comments period during which time concerns and objections can be lodged with the RSB Secretariat and audit team to review.
- Full audit report transparency: RSB makes all audit reports publicly available by default — not at the discretion of the CB — setting a high bar for disclosure and accountability.
- Transparent oversight reporting: The work of our Oversight Body is reported back regularly to RSB’s multi-stakeholder governance, ensuring system-wide accountability and continuous learning.
- Above all, grounded in RSB’s multi-stakeholder governance: All of RSB’s standards and certifications are developed through a genuinely inclusive, consensus-based process that brings together civil society, industry, academics, and government representatives. This ensures our assurance system reflects real-world sustainability priorities — not just theoretical best practices or commercial interests.
Through regular reporting, risk assessments, and technical checklists, RSB ensures that its certification system remains robust, responsive, and aligned with the evolving sustainability landscape — from EU RED and ICAO CORSIA to innovations in feedstock and emissions monitoring.
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A system that works — and evolves
This structured, multi-tiered approach — comprising RSB’s gold-standard Principles & Criteria, third-party auditing under reasonable assurance, and independent oversight built inside a system of genuine multi-stakeholder consultation and decision-making — forms a certification system that is not only credible but continually improving.
RSB’s sustainability standard and assurance framework have been independently verified through ISEAL and praised in comparative studies for its transparency, stakeholder engagement, and integrity of oversight.
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The bottom line? Credibility, verified
In a world where greenwashing undermines real progress, it is essential that oversight and assurance isn’t just an add-on — it’s central to building stakeholder confidence and supporting a credible, science-backed transition to a sustainable bioeconomy.
As we scale our systems and adapt to global challenges, this innovative assurance structure will continue to drive impact, protect integrity, and empower sustainable innovation.
Want to learn more? Contact the RSB Certification team at [email protected].
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