Renouncing the Acquired Effects of a Mandatory Law: What the Court of Cassation Allows

Imagine: you sign a contract to build your dream house in Castelnau-le-Lez. The bank refuses your loan, but you continue the works. Then, a few months later, you invoke the loan refusal to terminate the contract. The builder demands compensation. Who is right? The answer lies in a subtle but crucial distinction: can one renounce rights already acquired, even if they are protected by a mandatory law? The Court of Cassation decided in 1998, and its decision still sheds light on relations between individuals and professionals today.

The question every property owner asks: am I free to renounce a protection that the law grants me? For example, the law gives you a cooling-off period, or a suspensive condition for obtaining a loan. But if, afterwards, you decide not to invoke it, is that valid? The answer is yes, provided that this renunciation occurs after the acquisition of the right, without pressure or ambiguity.

In this case, the building owners had continued the works despite a loan refusal, and then terminated the contract by belatedly invoking the absence of a suspensive condition. The Court of Appeal held that they had renounced the benefit of this condition by continuing the works. The Court of Cassation upheld this reasoning. Here is why.

The facts: a story that happens every day

In 1991, Mr and Mrs X, a couple from Castelnau-le-Lez, sign a contract for the construction of an individual house (CCMI) with a construction company. The contract is subject to a suspensive condition (a clause that cancels the contract if an event does not occur): obtaining a mortgage. Five days after signing, the bank refuses the loan. Normally, the contract would be void. But the couple say nothing to the builder and continue the works.

Months pass. The building permit is obtained late. A demolition permit is refused. Finally, on 22 July 1992, the X couple terminate the contract, citing the loan refusal and administrative difficulties. The builder sues them to obtain payment of the contractual termination indemnity.

The Montpellier High Court finds in favour of the builder. The X couple appeal. The Montpellier Court of Appeal upholds: it holds that the building owners unequivocally renounced the benefit of the suspensive condition by continuing the works after the loan refusal, without informing the builder. The case goes up to the Court of Cassation.

The reasoning of the court — analysed

The Court of Cassation had to decide a question of principle: does a mandatory law (for example, one that protects the consumer) prohibit renouncing one's rights in advance, but allow renouncing the already acquired effects of that law? The answer is yes.

The legal basis is Article 6 of the Civil Code, which provides that "one cannot derogate by private agreements from laws that concern public policy and good morals." But caution: early renunciation of a right not yet born is prohibited, because it empties the law of its substance. However, once the right is acquired, its holder may freely renounce it, provided it is done unequivocally.

In this case, the X couple had the right to rely on the suspensive condition as soon as the loan was refused. This right was acquired. By continuing the works without saying anything, they clearly manifested their intention not to use it. The Court of Appeal therefore justified its decision by noting that, despite the loan refusal, they continued the construction site, then stopped for other reasons (delay of the building permit, refusal of demolition permit). This conduct was incompatible with the later invocation of the condition.

This decision is not a reversal: it confirms consistent case law. Judges always check that the renunciation is certain and unequivocal. If the couple had informed the builder of the loan refusal and asked for a suspension, they would have kept their right. But by acting as if nothing had happened, they lost the protection.

What this means for you — concretely

Landlord: if you renounce an acquired right (for example, the benefit of a forfeiture clause for non-payment of rent) by cashing a rent after the due date, you can no longer invoke it for that same arrears. In Sète, a landlord had accepted late rents for six months before wanting to terminate the lease: the court held that he had renounced the benefit of the clause.

Property buyer: if you sign a preliminary sale agreement with a suspensive condition for obtaining a loan, but you continue steps after a refusal (for example by applying for another loan), you risk implicitly renouncing the condition. Be clear: write to the seller to inform them of the refusal and ask for the agreement to be void.

Builder: if your client continues the works despite a lack of financing, document it. A simple exchange of emails can prove the renunciation. In case of a dispute, you can claim the contractual indemnity.

Four tips to avoid this type of dispute

• Immediately inform your counterparty as soon as an event affects your rights (loan refusal, latent defect, etc.). Do not let the situation settle.
• Avoid contradictory acts: if you want to invoke a clause, do not do things that show the opposite (continuing the works, paying rent after a formal notice).
• Formalise any renunciation in writing: an email or registered letter stating "I renounce the benefit of the suspensive condition" will avoid any ambiguity.
• Consult a lawyer before making an irreversible decision: a 30-minute consultation can save you from losing thousands of euros. In Montpellier, Maître Zakine's fees are affordable for an initial analysis.

Further reading: related case law and developments

This decision is part of a consistent line. For example, in a judgment of 9 July 2003 (n° 01-13.967), the Court of Cassation held that a tenant who pays an increased rent after a notice to quit for repossession can renounce challenging that notice. Likewise, in a decision of 6 October 2010 (n° 09-68.777), it validated a borrower's renunciation of the benefit of the cooling-off period after signing the loan offer.

The trend is clear: judges favour legal certainty in transactions. Once a party has clearly manifested its intention not to use a right, it cannot go back. This makes each person responsible for their actions. In the future, we can expect courts to increasingly require tangible evidence of an unequivocal renunciation (writings, active conduct).

Checklist before acting

1. Have I informed the other party in writing of the event that opens my right? (e.g., loan refusal) — If not, do so immediately.
2. Have I continued to perform the contract after that event? (e.g., continued works, paid rents) — If yes, you may have renounced.
3. Is my renunciation express and unambiguous? — If you want to renounce, write it in black and white.
4. What is the financial interest at stake? — Assess the amount of the indemnity you might have to pay if you lose your right.
5. Have I consulted a lawyer to check whether my conduct has already resulted in a renunciation? — Better safe than sorry.

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 →