Clients and suppliers of the CSTB can report their satisfaction or dissatisfaction (complaint, call) to the CSTB.

Cases of dissatisfaction may be reported directly to your CSTB contact or to the Quality and Ethics Department by post or email to

The procedure for responding to cases of dissatisfaction may be received on request from the Quality and Ethics Department:

The role of ombudsman

The role of the ombudsman, in the event of difficulties encountered in the performance of an ATEC service, is to facilitate the exchange and dialogue between the CSTB and the party requesting services. Mr André Crocherie holds the ombudsman’s duties for the ATec.