Either party who is aware of information whose importance is decisive for the consent of the other must inform the other of this fact if the latter is legitimately unaware of this information or trusts his co-contractor.
However, this duty to inform does not relate to the estimation of the value of the performance.
Information which has a direct and necessary connection with the content of the contract or the capacity of the parties is of decisive importance.
The burden of proving that the other party owed him information lies with the party who claims that information was owed to him, it being for that other party to prove that he provided it.
The parties may neither limit nor exclude this duty.
In addition to the liability of the party who was bound by it, a breach of this duty to inform may result in the annulment of the contract under the conditions set out in articles 1130 et seq.