Probity
The art expert must demonstrate serious competence in his field(s) of specialization (within the limit of three) and act according to principles of probity and morality uniting competence and experience.
Rigor
An expert is chosen for his skills, his technical knowledge in a specific field. He gives an opinion on examinations, findings, precise and objective facts.
He cannot commit himself on the basis of visual examinations of the work or the collection which will be the subject of the estimate.
He will establish an estimate of the amount of his fees. This estimate must be signed by the client.
The certificate of authenticity takes the form of a written document containing information allowing the identification of the work, namely, and as far as possible, its photograph, the name of the author if known, a description of the object, the supports and materials, its dimensions, a dating or a period of creation if known, the state of conservation with mention of possible restorations if they could be visually identified.