Guarantee against hidden defects: sale of a maritime pontoon without valid exclusion clause

Imagine: you have just bought a maritime pontoon in Saint-Vincent-de-Tyrosse for €15,000 to moor your fishing boat. The seller assures you it is in good condition, but after a few weeks the bottom of the hull tears: the plates are eaten away by rust. You discover that the seller knew about this problem for years. You can sue him, even if the contract states “sold as is”. This is what a judgment of the Court of Cassation of 11 April 1975, still relevant today, reminds us. This decision protects buyers against hidden defects that the seller knew or could not ignore.

But what exactly is a hidden defect? And how do you prove the seller was in bad faith? This article deciphers this landmark case law for you, with concrete examples from the Landes coast.

Whether you own a boat, a house or a plot of land, the principles established by this case apply to all sales. So, how should you react if you discover a defect after the purchase?

The facts: a story like those that happen every day

In 1972, a certain Mr. Domota, owner in Mimizan, sold a maritime pontoon to the company Normandie. The contract stated that the pontoon was sold “as recovery material, in its current condition”. In other words, an exclusion clause. But after the sale, the buyer discovered that the bottom of the hull was extremely thin due to oxidation. An ultrasonic inspection revealed that the thickness of rust was such that the pontoon was unfit for its purpose.

The buyer sued the seller for hidden defects. The seller defended himself by invoking the exclusion clause: “I sold it as is, the buyer knew what he was buying”. The Court of Appeal ruled in favour of the buyer, ordering the seller to pay damages to compensate for the loss. The seller appealed to the Court of Cassation, arguing that the Court of Appeal had not answered his arguments on the exclusion clause.

The Court of Cassation dismissed his appeal: it held that the Court of Appeal had sufficiently reasoned its decision by finding that the defect was hidden and that the seller, who had owned the pontoon for several years, knew its true condition. In short, an exclusion clause does not protect a seller who knows of the defect and does not disclose it to the buyer.

The reasoning of the court — dissected

The Court of Cassation relies on Article 1641 of the Civil Code (the guarantee against hidden defects): the seller is bound to guarantee hidden defects that render the thing unfit for its normal use. But this article also allows the guarantee to be excluded by an express clause. However, beware: this clause is only valid if the seller is unaware of the defect. If he knows about it, he is in bad faith and the clause is ineffective.

In this case, the lower courts found that the defect (extreme oxidation) existed before the sale and was hidden from the buyer. Even an inspection by a representative and an ultrasonic check had not detected it. On the other hand, the seller, who had used the pontoon for years, could not have been unaware of this condition. He therefore had an obligation to disclose it.

What few people know: the Court of Cassation does not review the facts; it only checks the correct application of the law. Here, the Court of Appeal had sufficiently explained why the defect was hidden and why the seller was in bad faith. The appeal was therefore dismissed.

In other words, this decision confirms an essential principle: the “sold as is” or “without guarantee” clause does not protect a seller who knows of the defect and conceals it. This is an evolution from the earlier case law, which was more favourable to the seller.

What this means for you — concretely

For the buyer: If you discover a defect after the purchase, you can take action even if the contract says “sold as is”. But you must prove that the seller knew of the defect. For example, if you buy a house in Mimizan and cracks appear, and the seller had carried out rendering work to hide them, you can sue him.

For the seller: If you sell a property as is, you must disclose all defects you know of. Otherwise, you risk being ordered to refund the price and pay damages. undefined, I have come across cases where sellers had to pay up to €30,000 for a defect they had hidden.

For the professional: A professional seller (such as a boat dealer) is presumed to know of defects. He cannot hide behind an exclusion clause. Example: if you sell a pontoon in Saint-Vincent-de-Tyrosse and the hull is rotten, you will be held liable even if you had not inspected the bottom.

Time limits to know: An action for hidden defects must be brought within two years from the discovery of the defect (Article 1648 of the Civil Code). Note: this time limit is often confused with the five-year limitation period for contractual liability actions. If you discover the defect, act quickly.

Four tips to avoid this type of dispute

• Before buying, have the property inspected by an independent expert. For a pontoon, a hull, or even a house, a precise diagnosis (ultrasound, thermography) can reveal defects. In Mimizan, you can find marine experts. Expect to pay €500 to €1,500 depending on complexity.
• Demand written guarantees. In the contract, ask for a hidden defects clause or a declaration from the seller about known defects. If the seller refuses, be wary.
• Keep all documents. Invoices, photos, emails, expert reports. In case of a dispute, these pieces of evidence are crucial.
• If you are selling, be transparent. Disclose in writing all defects you know of. You will avoid a lawsuit and a much more costly judgment. For example, if your roof leaks, mention it in the deed of sale.

Further reading: related case law and developments

This 1975 decision is part of a consistent line: since the Baldus judgment (Civ. 1re, 3 March 1998, No. 95-21.443), the Court of Cassation has reminded that an exclusion clause is ineffective if the seller is in bad faith. More recently, the judgment of 19 January 2022 (No. 20-16.244) extended this principle to non-professional sellers: even a private individual who sells a property knowing of a defect cannot shelter behind an exclusion clause.

The trend of the courts is therefore to protect the buyer, especially in property and maritime matters. In the future, we can expect the burden of proof to be lightened for the buyer: it would be enough to show that the seller had the means to know the defect (for example, if he had owned the property for a long time).

What you absolutely must remember

Practical FAQ:

• Can I take action if the contract says “sold as is”? Yes, if the seller knew of the defect and did not disclose it. The clause does not protect him.
• What are the time limits to act? Two years from the discovery of the defect. Do not delay.
• What must I prove? That the defect existed before the sale, that it is hidden (not detectable by a normal examination), and that the seller knew of it.
• Can I claim damages? Yes, you can obtain a refund of the price, repair costs, and sometimes damages for the loss suffered.
• Do I need a lawyer? Highly recommended. The procedure is technical and the evidence must be solid. A preliminary consultation can save you from mistakes.

Besoin d'un conseil personnalisé ? Contactez Maître Zakine — première consultation 30 min à 45€.

In summary: before any sale or purchase, be vigilant. And if a dispute arises, do not hesitate to consult a specialised lawyer.

Are you in a similar situation? A first 30-minute consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →