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Verification or certification: which one is your buyer actually asking for?
A request arrives asking for "ISO 14064 certification". No such thing exists in the way the sender imagines. Understanding why saves a procurement cycle, and sometimes an audit finding. This note sets out the distinction as the standards actually draw it.
Two activities that are routinely confused.
Validation and verification
ISO/IEC 17029:2019 · ISO 14065:2020- Examines a claim or assertion made by a party — an emissions inventory, a project reduction, a product footprint, a neutrality claim.
- Performed by a validation and verification body.
- Output: a validation or verification statement naming the assertion, the criteria, the boundary and the level of assurance.
- Verification looks at what has happened; validation looks at a claim about the future.
- Technical requirements from ISO 14064-3:2019; competence from ISO 14066:2023.
Management system certification
ISO/IEC 17021-1:2015- Examines a management system against a standard — ISO 9001, ISO 14001, ISO 45001, ISO 50001, ISO/IEC 27001 and others.
- Performed by a certification body.
- Output: a certificate with a defined scope and a surveillance cycle.
- Tells a user that a system is in place and operating, not that a specific number is correct.
- Audit programme, stage 1 / stage 2, surveillance and recertification.
What the request usually means.
| What you were asked for | What is normally meant | What to procure |
|---|---|---|
| "ISO 14064 certification" | Independent verification of a GHG inventory prepared to ISO 14064-1:2018 | Verification by an accredited validation and verification body |
| "Carbon footprint certificate" | Verification of a product carbon footprint quantified to ISO 14067:2018 | Product-level verification, and an EPD if a Type III declaration is wanted |
| "Verified ISO 14001" | ISO 14001:2015 management-system certification | Certification by an accredited certification body |
| "Carbon neutral certification" | Verification of a carbon neutrality claim against ISO 14068-1:2023 | Verification of the claim and its underlying inventory, plus the neutrality management plan |
| "CBAM certificate" | Verification of embedded emissions for a CBAM declaration | A verifier accredited for CBAM under Delegated Regulation (EU) 2025/2551, within a scope covering the goods |
| "Net zero certification" | Usually undefined — the buyer needs to state the criteria | Ask which criteria and which boundary before quoting anything |
Why the wrong instrument fails late.
A certificate procured where a verification statement was needed usually survives internal review and fails at the point of use — when a European customer, a lender or a disclosure platform reads the document and finds that it attests to a system rather than to a number. By then the reporting deadline is close and the data year has closed.
The reverse error is less common but more expensive: verifying a figure when the buyer's actual requirement was a certified management system, which cannot be produced retrospectively because it requires a system to have been operating over time.
The reliable test is to read the requirement rather than the request. Ask for the clause, the contract term or the regulation that generates the obligation, and let the instrument follow from it.
Primary sources
- ISO/IEC 17029:2019 — Conformity assessment: general principles and requirements for validation and verification bodies — www.iso.org/certification.html (checked 01 September 2026)
- ISO/IEC 17021-1:2015 — Requirements for bodies providing audit and certification of management systems — www.iso.org/certification.html (checked 01 September 2026)
- ISO 14064-1:2018 and ISO 14064-3:2019 — www.iso.org/certification.html (checked 01 September 2026)
- IAF mandatory documents — iaf.nu/en/iaf-documents- (checked 01 September 2026)
- Commission Delegated Regulation (EU) 2025/2551 — accreditation of CBAM verifiers — eur-lex.europa.eu/eli/reg_del/2025/2551/oj/eng (checked 01 September 2026)
Editorial note. Author and technical review above are editorial functions. They are separate from the independent technical review and the decision functions required under ISO/IEC 17029:2019, which apply to validation and verification engagements and not to published articles. Nothing on this page is advice on a specific engagement, and nothing here extends or replaces the accreditation records.
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Describe the claim — not the service.
Tell us what must be relied on, who will rely on it and by what date. We will confirm the correct programme, evidence requirement and responsible entity — or tell you it is outside our scope.