Fraud by Silence: When Not Speaking Can Void a Property Sale

Imagine: you have just bought a charming house in Angers, with a view of the Maine. The seller assured you everything was in order. But a few weeks after signing, you discover that the town hall refused a building permit for an extension you were planning. Worse: the seller knew about it before the sale and said nothing. Do you have a remedy?

This is precisely the question put to the Court of Cassation in the judgment of 15 January 1971, a landmark decision that changed the game for thousands of property transactions. The principle is simple but powerful: silence can be a lie.

In law, this is called fraud by concealment (intentionally hiding information). Before 1971, courts often required active deception. Now, not saying what you should say may be enough to void a sale. Analysis.

The facts: a story that happens every day

The case began in Villefranche-sur-Mer, in the Alpes-Maritimes. The company UCIM had applied for a planning permission (the administrative authorisation to build) for a plot of land. The prefect (the State's representative in the department) had issued an order of approval, but the procedure was not finalised.

At the same time, UCIM sold this land to the company Bezanger. The sale contract was signed on 14 March 1967. But here is the catch: even before the signing, on 14 March 1967, the prefect had refused the planning permission by a letter addressed to UCIM. And UCIM said nothing to the buyer.

On 1 July 1967, a regularisation permit (a modified permit) was granted, allowing the procedure to continue. But the damage was done: the buyer considered that it would never have contracted if it had known of the initial refusal. Bezanger therefore sued UCIM to have the sale annulled for fraud (fraudulent conduct that vitiates consent).

The Paris Court of Appeal ruled in favour of Bezanger, and UCIM appealed to the Court of Cassation. The issue was whether the mere failure to disclose the refusal of the permit constituted fraud, even without active misrepresentation.

The reasoning of the court — analysed

The Court of Cassation, in its judgment of 15 January 1971 (No. 69-12.180), dismissed UCIM's appeal. It confirmed that fraud could be constituted by the silence of a party concealing from the other contracting party a fact which, if known, would have prevented that party from contracting.

The legal basis is the former Article 1116 of the Civil Code (now Articles 1137 and 1138) which provides that fraud is a ground for nullity of the contract when the practices used by one of the parties are such that it is obvious that, without them, the other party would not have contracted. The Court here extends the notion of "practices" to intentional silence.

The judges considered that UCIM, knowing that the permit was refused, had a duty to inform Bezanger. By not disclosing this decisive fact (without which Bezanger would not have bought), UCIM committed fraud. It matters not that the procedure was later regularised: the initial consent was vitiated.

This judgment marks a turning point. Before it, courts required positive acts of deception (false statements, falsified documents). Now, silence can be as serious as a lie. This is known as fraudulent concealment (the act of withholding information that one has a duty to disclose).

The Court of Cassation has since confirmed this position in many judgments, particularly in property matters: sale of polluted land, existence of an easement (right of way or other restriction), latent defect (hidden defect rendering the property unfit for use).

What this means for you — practically

If you are a buyer: you must be vigilant. The seller has a duty to inform you of any element that could influence your decision to buy. For example, if you buy a flat in Angers and the seller knows that the co-ownership has voted for major works (cladding, lift), he must tell you. If he does not, you can ask for the sale to be annulled (action for nullity) or damages (financial compensation). Caution: the time limit to act is 5 years from the discovery of the fraud (Article 1144 of the Civil Code).

If you are a seller: transparency is your best ally. Do not hide anything. A failure to inform can cost you dearly. Let's take a concrete example: you sell a house in Cholet for €250,000. You know that the cellar regularly floods but you do not say so. The buyer discovers the problem after the sale and starts proceedings. If the court annuls the sale, you must repay the price (€250,000) and reimburse the notary's fees (about 8% or €20,000). Not to mention damages (e.g., moving costs, moral prejudice). In total, over €300,000.

For developers and property professionals: the duty to inform is even stricter. You are deemed to know, and your silence will be presumed intentional. A mere error of judgment is not enough: it must be proved that you knew the fact and deliberately hid it. But in practice, courts are severe: if you had a doubt, you should have disclosed it.

Four tips to avoid this type of dispute

• Before buying, ask written questions: ask the seller to fill in a detailed questionnaire about the condition of the property (upcoming works, claims, planning permissions). Keep the answers. If the seller lies or omits, this will be evidence of fraud.
• Use a professional: a certified property diagnostician (for technical reports: asbestos, lead, energy performance) and a notary (to check easements, boundaries, planning permissions). These third parties provide security.
• Do not hesitate to consult the town hall: before signing, check the local urban plan (PLU), planning permissions filed in the area, and any public utility easements. In Angers, the town hall provides a single online counter.
• Include a warranty clause in the deed: have your notary draft a clause by which the seller declares that he has communicated all relevant information and undertakes to indemnify you in case of breach. This facilitates proof of fraud.
• If you are selling, be proactive: anticipate questions. If you know that the neighbour plans construction that could obstruct your view, say so. Better to lose a buyer than to win a lawsuit.

Further reading: related case law and developments

The 1971 judgment paved the way for a series of decisions that strengthened the duty to inform. For example, the Court of Cassation held in 2013 (Civ. 3rd, 3 July 2013, No. 12-20.202) that the seller of a building must inform the buyer of the existence of a danger procedure (threat to safety) even if it was not yet final. Similarly, in 2016 (Civ. 1st, 21 January 2016, No. 14-29.461), it specified that the seller's silence on the lack of planning permission for an extension constitutes fraud, even if the buyer could have checked it himself.

The trend is therefore towards increased protection of the buyer. Courts consider that a professional seller (estate agent, developer) has a reinforced, almost automatic duty to inform. For private individuals, the assessment is more nuanced: it must be shown that the seller knew the fact and knew it was decisive for the buyer.

For the future, case law continues to evolve. With the digitalisation of transactions, the issue of pre-contractual information (before signing) arises more acutely. Courts may require sellers to provide increasingly numerous documents (expert reports, soil studies, etc.) on pain of nullity.

Frequently asked questions

What is fraud by silence or fraudulent concealment?
It is the act of intentionally hiding important information from the other party, preventing it from giving free and informed consent. For example, not saying that the roof leaks or that the house is in a flood zone.

Can I void a sale if the seller did not inform me of a latent defect?
Yes, but a latent defect (Article 1641 of the Civil Code) is different from fraud. For a latent defect, you must prove that the defect makes the property unfit for use and that it existed before the sale. For fraud, you must prove intent to deceive. The two actions can be combined.

What is the time limit to bring an action for nullity for fraud?
You have 5 years from the discovery of the fraud (Article 1144 of the Civil Code). After this period, you lose any remedy. It is therefore essential to act quickly.

What should I do if I discover fraud after the sale?
Gather all evidence (emails, statements, photos). Consult a lawyer specialising in property law to assess the strength of your case. A formal notice (registered letter) to the seller may sometimes lead to an amicable solution. Otherwise, bring legal proceedings.

Can the seller be ordered to pay damages without annulment?
Yes, you can claim damages (financial compensation) even if you do not wish to annul the sale. For example, if the defect is minor, the court may award you an amount corresponding to the cost of repairs.

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 →