Ratification of mandate: when approval of management extinguishes all recourse

Imagine: you own a building in Châteaulin. You entrust an agent with renovating your roof for a budget of €50,000. Work begins, but very quickly the agent exceeds the budget: he orders high-end joinery, replaces the roof frame without telling you. You receive the invoices, you pay them without flinching. Then, six months later, you discover the total amount: €80,000. Anger rises. You want to sue the agent. But the law prevents you. Why? Because by paying without protest, you ratified his action.

This is exactly what the Court of Cassation ruled in a judgment of 12 May 2010 (No. 08-20.544). A decision that makes overly trusting owners tremble. "The retroactive effect of ratification, entailing approval of the agent's management, means that the principals have no recourse against him", states the high court. In other words: as soon as you approve, even implicitly, the acts of your agent, you lose any right to take action against him. A brutal lesson in contract law.

So, how to avoid this trap? Should you monitor every expense? And if you have not ratified anything at all? This article dissects the judgment and gives you the keys to avoid being caught out. Because in Plouhinec as elsewhere, a poorly managed mandate can cost dearly.

The facts: a story like many others

Mr and Mrs X, owners of a house in Châteaulin, wish to carry out extension works. They entrust the management of the operation to a professional agent, Mr Y, who signs a project management contract. The initial budget is set at €120,000 including tax.

But very quickly, things go wrong. The agent undertakes additional works without the express consent of the owners: custom-made wooden joinery, interior painting, modification of the roof frame. The total cost soars to €150,000. Mr and Mrs X discover the bill after the completion of the works. Furious, they refuse to pay the surplus and sue the agent for breach of his mandate.

The first instance court rules in their favour: the agent exceeded his authority. But on appeal, the Rennes Court of Appeal reverses this judgment. It notes that the owners paid several invoices without protest, and even attended site meetings where the overruns were discussed. According to the judges, these acts amount to implied ratification. The X spouses appeal to the Court of Cassation.

The Court of Cassation dismisses their appeal. It confirms that ratification – even tacit – has retroactive effect: it purges all excesses of the agent. Consequently, no further recourse is possible. The owners must pay for all the works, including the extras.

The reasoning of the court – dissected

The Court of Cassation bases its decision on Article 1998 of the Civil Code, which provides that the principal must perform the obligations contracted by the agent in accordance with the authority given to him, and that he is only bound by what has been done beyond that if he has ratified it expressly or tacitly. In short: if you let things happen, you are deemed to approve.

The judges recall that ratification may be express (a signed document) or tacit (acts that unequivocally manifest the intention to approve). In this case, the payment of invoices and attendance at meetings constitute sufficient tacit acts. Once ratification occurs, it retroacts to the date of the agent's act. Thus, the disputed works are deemed authorised from the outset.

The Court rejects the owners' argument that they were unaware of the overrun. It considers that their behaviour – paying without reservation – demonstrates an unequivocal intention to approve. It does not matter that they were poorly informed: ratification is a unilateral act that does not require knowledge of all details.

This solution is not new: it confirms consistent case law (Civ. 1st, 11 May 1983, No. 81-15.432). But it is particularly harsh for principals, as it prohibits any contractual liability claim against the agent after ratification. The only possible outcome would be to prove fraud (intentional deception) or excusable error, which is rarely admitted.

What this changes for you – concretely

For a landlord owner in Plouhinec who entrusts the renovation of his studios to an agent, this decision means he must monitor every expense in real time. If you pay an invoice of €15,000 for additional works without having signed an addendum, you lose any recourse to contest the amount. Example: Mr L, owner in Châteaulin, saw his agent order non-planned soundproofing for €8,000. He paid, then wanted to sue. Too late: the Court of Cassation opposed the 2010 judgment to him.

For a tenant, this has no direct impact, but indirectly: if your landlord acts through an agent, any ratification by the landlord of the agent's acts (for example, by paying for repairs without contesting) may deprive you of a recourse against the agent in case of defects. You would then have to act directly against the owner.

For a buyer, if you purchase a property that has been subject to works by an agent, check that the invoices were approved by the seller. Otherwise, the seller could take action against the agent, but if he ratified, it is over. Advice: require a ratification receipt.

For a co-ownership, the managing agent is an agent. If the co-ownership council approves his accounts without reservation, the co-owners can no longer attack the managing agent for unauthorised expenses. It is the same logic: approval at a general meeting amounts to ratification.

Four tips to avoid this type of dispute

• Require a written document for any budget overrun. Before paying an extra, have an addendum to the mandate contract signed. This avoids any tacit ratification.
• Pay under reservation. If you pay an invoice that seems excessive, add the mention "subject to all rights" or "without approval of the management". A simple registered letter to the agent can break the retroactive effect.
• Attend site meetings with a critical eye. Do not just listen: ask for accounts, demand prior quotes. If you remain passive, your silence may be interpreted as approval.
• Consult a lawyer as soon as the first disagreement arises. A quick consultation (€45 with Maître Zakine) can save you from unintentionally ratifying. Do not wait until you have paid to react.

Further analysis: related case law and developments

The 2010 solution has been consistent since a judgment of the first civil chamber of 11 May 1983 (No. 81-15.432), which had already held that tacit ratification purged the agent's excesses of authority. More recently, the Court of Cassation clarified that ratification may result from the principal's mere silence when he had knowledge of the acts (Civ. 1st, 19 December 2012, No. 11-24.982).

Courts interpret the concept of ratification strictly. For example, simply attending a meeting without protesting may suffice. On the other hand, a principal who demonstrates that he had no knowledge of the acts (e.g., because the agent hid them) may escape ratification. But the burden of proof is heavy.

For the future, the trend is towards protecting the principal against unscrupulous agents, but case law remains firm on the retroactive effect. A reform of contract law in 2016 (ordonnance of 10 February 2016) did not change the rules of mandate on this point. So vigilance is required.

What you absolutely must remember

FAQ

1. Can I still sue my agent if I paid an invoice without protest? No, unless you prove fraud or error. Payment without reservation amounts to ratification.

2. What if I discover an overrun after paying? You can try to demonstrate that you had no knowledge of the facts at the time of payment. But it is difficult. Better to consult a lawyer immediately.

3. Can an agent be criminally prosecuted for breach of trust even after ratification? Yes, because ratification does not erase the criminal offence. But in practice, courts are reluctant if the principal approved the acts.

4. Can I partially ratify the agent's acts? No, ratification is global: you either approve everything or contest everything. There is no partial ratification in French law.

5. Can an agent rely on my ratification if I have not signed any document? Yes, if your behaviour (payments, attendance at meetings) unequivocally shows your approval.

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 →