A side-by-side comparison of Notified Body and Conformity Assessment Body. Understand how formal EU designation differs from the broader category of third-party assessment organizations.
Quick Verdict: Use Conformity Assessment Body for the broader assessment organization; use Notified Body when that body is formally designated under EU law.
Notified Body defines conformity assessment body formally designated under EU law to assess whether certain products or systems meet applicable requirements.
Context: Most relevant when a regulated AI system requires assessment by a body formally designated under EU law.
Conformity Assessment Body defines organization that performs third-party assessment activities such as testing, certification, or inspection.
Context: Most relevant when describing an organization that performs independent testing, certification, inspection, or assessment.
| Aspect | Notified Body | Conformity Assessment Body |
|---|---|---|
| Legal role | A notified body is a conformity assessment body that has been formally designated under EU law. | A conformity assessment body is the broader category of organizations that conduct third-party testing, certification, inspection, or assessment. |
| Lifecycle position | It may enter the process when EU law requires or allows designated third-party involvement in conformity assessment. | It may support assessment activities wherever testing, certification, or inspection is needed. |
| Main obligations | Its role is tied to formal EU designation and applicable conformity assessment procedures. | Its role is to perform assessment activities against relevant standards or legal requirements. |
| Documentation duties | Documentation should show designation, scope, assessment procedure, and findings where applicable. | Documentation should show assessment scope, methods, evidence reviewed, and certification or inspection results. |
| Common mistake | A common mistake is assuming any assessor can act as a notified body. | A common mistake is assuming every conformity assessment body has EU notified-body status. |
| Regulatory precision | Use the term only when formal designation under EU law is relevant. | Use the term when describing the general function of independent assessment. |
In practice, the safest wording is to use conformity assessment body for the general function and notified body only when the formal EU designation is confirmed.
Calling any AI auditor a notified body.
Assuming a conformity assessment body automatically has EU notified status.
Failing to verify the body’s scope of designation.
Using role labels loosely in contracts and audit checklists.
Use Notified Body when the assessment organization has formal EU designation and the relevant regulatory procedure depends on that status. The term is precise and should not be used for any ordinary consultant, auditor, or testing provider.
Use Conformity Assessment Body when referring to an organization that performs third-party assessment activities such as testing, certification, or inspection. It is the broader term and may or may not involve EU notified status.
For EU AI Act compliance, role precision matters because responsibility allocation, conformity procedures, and evidence ownership may depend on the correct legal actor. Contractual due diligence should verify whether an assessment body has the required designation for the specific procedure.
Yes. A notified body is a conformity assessment body that has been formally designated under EU law for relevant assessment activities.
No. Conformity assessment body is broader. A body becomes a notified body only when it is formally designated under EU law.
Some regulated AI procedures may require specific third-party involvement. Using the wrong role label can create gaps in due diligence, contracts, and compliance evidence.
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