The inspector must meet the qualification of QEI-1 unless specifically exempted by State or Local law. A call to your local code enforcement agency (building department or fire marshall) should be able to help you.
The QEI-1 inspector should be required to present proof of their current certification. Additionally, proof of adequate insurance meeting the requirements of Local or State laws should always be required.
A QEI-1 certified inspector is not permitted to perform inspections on the elevators for which they have a clear financial interest. It is considered unethical for any QEI-1 certified inspector to perform an inspection on any elevator equipment for which they have a financial interest in the results of the inspection. In all cases, before agreeing to allow a QEI-1 inspector to perform any inspections it should be completely understood that they are acting independently and acting on behalf of the Authority having jurisdiction only, and for the benefit of the Owner and riding public.