Yeah ... I think I'm going to change jobs and move to France
In the Walloon region, not only must the experts be qualified and trained, but in addition, the audits are centralized and can be verified by the Region.
They are on the other hand expensive: 4 to 600 euros for an average house of which 40 or 60% taken care of in the form of premiums (therefore, the owner goes through the authorized auditors to touch the premium)
The auditor is strictly prohibited from recommending a supplier to perform the work.
(although nothing prevents them from "warning" a friend, who must all the same (you saw, Christophe, I made an effort
) compete.)