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How do I tell whether an ISO 27001-certified vendor really has its house in order?

The certificate says an external party reviewed an ISMS, not which risks and controls were in scope. Always probe on scope, Statement of Applicability and certifying body.

Try this first

  1. 1Ask for the certificate itself, not just the logo. Check that an accredited body issued it and that the version is ISO 27001:2022.
  2. 2Read the scope statement. Does it cover the whole company and the service you buy, or only one office or a different product?
  3. 3Request the Statement of Applicability or a summary. It states which controls apply and which are excluded with justification.
  4. 4Ask whether they have recent audit findings or pen-test reports they will share under NDA. A healthy ISMS has open items; perfection is suspect.
  5. 5Combine the certificate with your own contractual requirements: SLA, security annex, breach notification, audit right where relevant.

When to bring us in

High-risk processing or sensitive sectors (health, finance) need more than ISO. Ask additionally for SOC 2 Type II or a NEN 7510 report.

See also

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