Behind every accredited ISO management system certification is a broader infrastructure designed to provide confidence in the certification process.
This structure involves several independent organizations, each with a different role—from developing international standards to accrediting certification bodies and ultimately assessing organizations against those standards.
Together, these organizations form what we can call a certification trust chain.
Understanding this chain helps explain why accredited certification can provide confidence to customers, regulators, business partners, and other interested parties around the world.
Let’s take a closer look at each level.
1 – ISO (International Organization for Standardization)
At the beginning of the certification trust chain is the International Organization for Standardization (ISO).
ISO develops and publishes international standards, including widely adopted management system standards such as ISO 9001, ISO 14001, ISO 45001, and many others.
However, there is an important distinction:
ISO does not certify organizations and does not conduct certification audits.
Instead, ISO develops the standards containing the requirements against which organizations may subsequently be assessed by independent certification bodies.
In other words, ISO establishes the standards, while conformity assessment activities are performed independently.
2 – Global ACI (Global Accreditation Cooperation Incorporated)
The next part of the international accreditation infrastructure is Global Accreditation Cooperation Incorporated (Global ACI).
Global ACI became fully operational on January 1, 2026, bringing together the international accreditation activities previously associated with the International Accreditation Forum (IAF) and the International Laboratory Accreditation Cooperation (ILAC).
Global ACI maintains the Global ACI Multilateral Recognition Arrangement (MRA), which supports international confidence in accredited certificates, reports, and statements issued under the arrangement.
Its role includes promoting harmonized accreditation practices and supporting confidence in conformity assessment across international markets.
The consolidation of the former IAF and ILAC activities into Global ACI created a single international organization and a unified multilateral recognition arrangement.
3 – Accreditation Bodies
Accreditation bodies assess the competence of conformity assessment bodies, including certification bodies.
Their role is fundamentally different from that of a certification body.
A certification body evaluates whether an organization’s management system conforms to the applicable certification requirements.
An accreditation body, on the other hand, evaluates whether the certification body itself is competent and operates according to applicable international accreditation requirements.
Accreditation therefore adds another level of independent oversight to the certification process.
Accreditation bodies that are signatories to the Global ACI MRA participate in an international recognition framework designed to increase confidence in accredited conformity assessment results across different economies.
4 – Certification Bodies
Certification bodies have direct contact with organizations seeking certification.
They conduct certification audits and evaluate management systems against applicable standards and certification requirements.
This level includes activities such as:
- Initial certification audits
- Surveillance audits
- Recertification audits
- Review of audit results
- Independent certification decisions
- Issuance and maintenance of certificates
Certification bodies seeking to provide accredited certification must demonstrate their competence and conformity with applicable accreditation requirements to their accreditation body.
This creates an important separation of responsibilities: auditors conduct assessments and collect evidence, while the certification body follows its established processes to make the certification decision.
5 – Certified Organizations
At the operational end of this trust chain are the organizations that implement management system standards and pursue certification.
These organizations establish and maintain management systems based on standards such as ISO 9001, ISO 14001, ISO 45001, ISO/IEC 27001, and others.
They undergo independent audits and, when the applicable certification requirements have been fulfilled and a positive certification decision has been made, receive certification.
Certification does not end there.
Certified organizations continue to undergo periodic surveillance and recertification activities to demonstrate that their management systems continue to meet applicable requirements and remain effective.
Ultimately, this is where the benefits of management system standards reach customers, employees, suppliers, business partners, and other interested parties.
Understanding the ISO Certification Trust Chain
In simplified terms, the accredited certification trust chain can be understood as follows:
- ISO – Develops and publishes international standards.
- Global ACI – Maintains the international multilateral recognition framework for accreditation.
- Accreditation Bodies – Assess and accredit competent conformity assessment bodies.
- Certification Bodies – Audit organizations and make certification decisions.
- Certified Organizations – Implement management systems and demonstrate conformity with applicable certification requirements.
Each participant has a different responsibility, and these roles should not be confused.
Together, they create a global framework designed to support competence, impartiality, consistency, and confidence in accredited conformity assessment.
Why Does This Trust Chain Matter?
The value of accredited certification does not depend solely on the certificate itself.
Confidence comes from the infrastructure supporting it.
A certified organization is assessed by a certification body. An accredited certification body is independently evaluated by an accreditation body. At the international level, recognition arrangements such as the Global ACI MRA help support confidence in accredited conformity assessment results across different economies.
This structure contributes to greater acceptance of accredited certificates across markets and can help facilitate international trade.
Therefore, the certification trust chain is much more than a sequence of organizations.
It is an international system built around competence, impartiality, consistency, and confidence.
That is why the credibility of accredited certification depends not only on the organization issuing the certificate, but also on the strength of the entire infrastructure supporting it.
