Checking or verifying an official notified body involves consulting accredited database registries maintained by national health authorities or European regulatory bodies, such as the EU's NANDO (New Approach Notified and Designated Organisations) information system. Medical device manufacturers and regulatory professionals use these official directories to search for specific organization identification numbers, check the exact scope of designation and legislative directives for which the body is authorized, and confirm its current legal standing to perform conformity assessments.