Preliminary Sale Agreement Without Mandate: When the Estate Agent Commits the Owner

Imagine: you are the owner of a house in Béziers, in the Devèze neighbourhood. One day, you receive a letter from a notary informing you that your property has been sold by an estate agent, without you ever having signed a mandate. Impossible, you think? Yet this is exactly what happened to an owner in 1987, and the Court of Cassation upheld the sale. How is this possible?

The question every owner who entrusts the sale of their property to a professional asks is simple: how far can the agent commit me? And if the agent exceeds his mandate, am I protected? The answer is not as straightforward as one might think. In French law, the mandate (written or oral) defines the agent's powers, but case law has developed the concept of "apparent mandate": under certain conditions, the agent can bind the owner even without actual authority.

The decision of 6 January 1994 (No. 91-22.117) is the leading case on this point. The Court of Cassation ruled in favour of purchasers who had signed a preliminary sale agreement with an estate agent, even though the owner had given no written mandate. The judges held that the buyers could legitimately believe in the agent's authority, given the circumstances. Let us delve into this case to understand what it means for you.

The Facts: A Story Like Many Others

In 1987, an owner (let's call him Mr X) decides to sell his house in Béziers. He contacts a local estate agent, well known in the region, for a valuation. But no written mandate is signed: Mr X merely thinks he is "testing the market." The agent, for his part, places an advertisement in a local newspaper in the Hérault department, mentioning the property. A couple, Mr and Mrs A., respond to the advert. After viewing, they accept the advertised price: 500,000 francs (about €76,000, a significant sum at the time).

On 24 October 1987, the estate agent signs a preliminary sale agreement with Mr and Mrs A., describing himself as "agent" on the last page. He even includes his professional card number. The buyers pay a deposit of 50,000 francs. But when the owner learns of this, he refuses to sell: he never gave the agent a mandate, let alone the authority to sign a preliminary agreement. The notary is instructed, and Mr and Mrs A. sue Mr X for specific performance.

The High Court (tribunal de grande instance) of Béziers rules in their favour at first instance, holding that the apparent mandate applies. Mr X appeals. The Court of Appeal of Montpellier upholds the judgment in 1991. Mr X then appeals to the Court of Cassation. But the Court of Cassation dismisses his appeal on 6 January 1994. In its view, the lower courts correctly applied the theory of apparent mandate: the buyers, a boilermaker and a woman without occupation, had no reason to doubt the agent's authority, given that he had placed an advertisement, shown the property, and signed the preliminary agreement clearly indicating his capacity as agent with his professional card number.

The Court's Reasoning - Analysed

The legal basis is Article 1240 of the Civil Code (formerly 1382), which provides that "any act of a person which causes damage to another obliges the person through whose fault it occurred to make reparation." But here, the Court of Cassation primarily uses the theory of apparent mandate, which is a judicial construct. In short, even without a real mandate, if a third party (here the buyers) could legitimately believe that the agent was authorised, the owner is bound as if the mandate existed.

To establish this legitimate belief, the Court notes several factors: (1) the buyers responded to an advertisement in a local newspaper, suggesting that the agent was mandated to sell; (2) the agent signed the preliminary agreement as agent, with reference to his professional card; (3) it is not customary in these circumstances for "lay" buyers (one a boilermaker, the other without occupation) to demand to see the written mandate. In other words, the agent's conduct was sufficiently credible to deceive the vigilance of ordinary buyers.

However, the Court does not say that any agent can bind the owner without a mandate. It specifies that the belief must be legitimate, meaning that the buyer was not negligent. If the buyer is a property professional, he cannot rely on apparent mandate. In this case, the modest profile of the buyers worked in their favour. What few people know is that apparent mandate can also work against the owner if the agent exceeds his powers, even with a limited written mandate. For example, if the mandate only permits viewings, but the agent signs a preliminary agreement, the owner may be bound if the buyer was unaware of the limits.

The 1994 decision is a confirmation of earlier case law, not a reversal. It fits into a line of decisions protecting good faith buyers. But it has been criticised for being "harsh" on owners: in practice, an owner can find himself bound by an act he did not intend, simply because the agent took the initiative.

What This Means for You - Practically

If you are a seller, this decision is a warning: do not let an agent act without a precise written mandate. If you entrust your property to an agent, sign a written mandate that clearly delimits his authority (mere introduction of a buyer, or power to sign the preliminary agreement?). If the agent signs a preliminary agreement in your name without a mandate, you could be forced to sell, like Mr X. undefined, I have come across cases where owners in Sète gave a verbal mandate for a valuation, and the agent conducted viewings and signed a preliminary agreement. Fortunately, the buyer was an experienced investor, and the apparent mandate was not upheld.

If you are a buyer, this case law protects you, but only if you are in good faith. If you have doubts about the agent's authority, ask to see the written mandate. The notary will check it before signing the final deed. If the owner refuses, you can sue him to enforce the apparent mandate, but beware of costs: expect about €2,000 to €5,000 in legal fees and proceedings, for an uncertain outcome.

For estate agents, the lesson is clear: never sign a preliminary agreement without a written mandate. You would incur your professional civil liability (Article 1240) and could have to compensate the owner for any loss suffered (for example, if the property was sold below market price).

Four Tips to Avoid This Type of Dispute

• Insist on a written mandate before any service: whether you are an owner or a buyer, do not let any agent act without a signed mandate. The mandate must specify the duration, price, and powers (mere introduction or signature of a preliminary agreement).
• Check the agent's professional card: every estate agent must hold a professional card issued by the prefecture. Its number must appear in the preliminary agreement. If not, be wary.
• As a buyer, ask to see the mandate: before signing a preliminary agreement, ask the agent to show you the written mandate signed by the owner. If he refuses, it is a red flag.
• Engage a solicitor for signing the preliminary agreement: for significant transactions, a solicitor specialising in property law can verify the validity of the mandate and advise you. The cost (a few hundred euros) is often less than the risk of litigation.

Further Reading: Related Case Law and Developments

The 1994 decision was reinforced by a decision of the Court of Cassation of 13 May 1998 (No. 96-14.628), which held that apparent mandate can arise from the owner's mere conduct, such as allowing the agent to show the property in his absence. However, the Court set a limit in a decision of 9 July 2003 (No. 01-15.710): if the buyer is a property professional, legitimate belief is harder to establish. The current trend is therefore to protect unsophisticated individuals, but not professionals.

Since the ALUR Law of 2014, the obligations of estate agents have been strengthened: the mandate must be in writing and contain mandatory clauses, failing which it is void. But the case law on apparent mandate remains applicable because it is based on the protection of good faith. Looking ahead, courts may become more demanding on the buyer's duty to verify the mandate, especially with the rise of online transactions.

Frequently Asked Questions

Can an estate agent sign a preliminary agreement without a mandate? In principle, no, but if the buyer legitimately believed in the agent's authority (apparent mandate), the owner may be bound. This is what the Court of Cassation ruled in 1994.

Can I cancel a preliminary agreement signed by an agent without a mandate? If you are the owner, you can argue the lack of mandate, but you risk losing if the buyer proves his good faith. If you are the buyer, you can seek specific performance or damages.

What is the time limit to take legal action? The limitation period is 5 years from the signing of the preliminary agreement (Article 2224 of the Civil Code). However, it is advisable to act quickly, as evidence fades.

What should I do if the agent signed a preliminary agreement without my consent? Contact a solicitor immediately. You can sue the agent for civil liability for fault, and the buyer to establish the lack of mandate. But if the buyer is in good faith, you risk being forced to sell.

Does apparent mandate apply to leases? Yes, the same theory can apply to a lease signed by an agent without the owner's mandate. However, case law is less abundant.

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