Field guide
Separate the standard, the certificate and the accreditation
Identify who sets requirements, who assesses conformity and whose competence is being recognised.
Name the role behind each claim
A supplier statement often places a standard name, a certification mark and an accreditation mark together. Read them as separate pieces of information. Identify the requirements being referenced, the organisation that issued the certificate and the body named in the accreditation claim. Keep the names and references in separate fields so that one badge does not stand in for the whole chain.
Understand what the certificate says
ISO describes certification as independent written assurance that the stated product, service or system meets specified requirements. The certificate concerns the subject and scope it names. ISO develops standards but does not issue these certificates. Use the actual issuer's name in a review rather than describing an organisation as certified by ISO.
Check the accreditation claim separately
Accreditation concerns recognition of the conformity assessment body's competence for specified work. It does not make your own purchasing decision. Identify the accreditation body, the accredited organisation and the listed activity, then use the relevant body's official information to check the claim. Keep a dated reference. If your contract requires accredited certification, verify that requirement directly instead of inferring it from the certificate's design.
Follow a practical reading sequence
Fictional example: a buyer receives a certificate for a supplier's management system. The buyer records the standard and version, checks the issuer and certificate status, then checks the asserted accreditation for that issuer and activity. Finally, the buyer compares the certified scope with the purchased service. These are separate checks; completing the first does not complete the others.
Use precise language in the decision
Write which document and status were checked, which service was covered and what remains unverified. Avoid treating a test report, a self-declaration and a certificate as interchangeable. The next action depends on the evidence actually required by the use case. For a service-boundary review, continue with the certificate scope guide and the supplier worksheet.
Sources and method
Primary references checked 4 November 2026. The workflow and fictional examples are original editorial guidance; they are not a quoted standard or an endorsement.