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A certificate issued by a certification body that has been formally recognized by a national accreditation body (like ANAB or UKAS) as competent to audit against a specific standard.
For ISO 42001, accreditation ensures that the auditors have the specific AI domain expertise required to judge technical controls like bias mitigation or model explainability. An unaccredited certificate may look identical but carries significantly less legal weight and may not be accepted by regulators as evidence of reasonable care.
Real world example:
A bank selects a certification body accredited by UKAS to perform their ISO 42001 audit to ensure the resulting certificate is recognized by the PRA and FCA.
