Sale Annulment for Lack of Mandatory Professional Disclosure

The case involved a contract for the sale of land where the seller failed to fulfill a mandatory pre-sale obligation concerning professional disclosure, leading the buyer to seek annulment of the sale. The Court of Cassation quashed the lower court's decision, reasoning that the absence of the legally required professional disclosure, which is a condition precedent to the validity of the sale contract, constitutes a fundamental breach that justifies the contract's nullity, regardless of whether the buyer suffered actual harm from the omission.