Reference decision: cc • No. 08-10.365 • 2009-09-09 • View the decision →
Imagine you own an apartment in a residential building in Parentis-en-Born, near the lake. You attend the annual general meeting, you vote on the budget, you choose a new managing agent. Everything seems regular. But a few months later, a co-owner challenges this meeting and obtains its annulment. What happens then to the decisions taken at subsequent meetings, convened by this same managing agent?
This question is not theoretical: it affects thousands of co-ownerships in France, including in the jurisdiction of Mont-de-Marsan where I practice. Co-owners in Tarnos, with their buildings facing the ocean, also ask it regularly. When a general meeting is annulled, does everything that followed automatically become void?
The Court of Cassation answered clearly in a judgment of 9 September 2009. Its position is firm: the annulment of a general meeting has a retroactive effect that can call into question the very legitimacy of the managing agent who convened the subsequent meetings. But what does this actually change for your co-ownership?
The facts: a story as it happens every day
The story begins like so many others in co-ownerships in the Landes region. Mr. Y..., a professional managing agent, is appointed at a general meeting on 20 September 2003 to manage a co-ownership. Everything seems normal until a co-owner discovers a formal defect: the managing agent had not opened a separate account at the time of his appointment, as required by law.
This co-owner, meticulous like some owners I meet in Mont-de-Marsan, decides to act. He takes legal action against the general meeting of 20 September 2003 to obtain its annulment. Meanwhile, the life of the co-ownership continues: Mr. Y... convenes a new general meeting on 25 June 2004, then another on 3 June 2005. He presents the accounts, proposes works, has the budget voted on.
But here is the problem: in the meantime, the court annuls the general meeting of 20 September 2003 retroactively. Technically, this means that Mr. Y... was never legally appointed as managing agent. Yet, he continued to exercise his functions and convene meetings. The challenging co-owner does not stop there: he also requests the annulment of the meetings of 25 June 2004 and 3 June 2005, on the grounds that they were convened by someone who no longer had the status of managing agent.
The court of appeal rejects his request, considering that the managing agent remained competent to convene meetings as long as the annulment of his appointment was not final. This is where the case takes a decisive turn: the co-owner appeals to the Court of Cassation, and the entire question of the retroactive effect of annulment is raised.
The reasoning of the court — dissected
The Court of Cassation, in its judgment of 9 September 2009, quashes the appeal court's decision. Its reasoning is based on two fundamental texts of co-ownership law: Article 42, paragraph 2, of the Law of 10 July 1965 (which governs the functioning of general meetings) and Article 7 of the Decree of 17 March 1967 (which specifies the conditions for appointing the managing agent).
The judges of the Court of Cassation recall an essential principle: the annulment of a legal act produces a retroactive effect. In other words, when a general meeting is annulled, it is as if it never existed. In our case, since the general meeting of 20 September 2003 that appointed Mr. Y... as managing agent was annulled, Mr. Y... is deemed never to have been legally the managing agent.
The appeal court had considered that the managing agent could continue to exercise his functions as long as the annulment was not final. But the Court of Cassation rejects this argument: the retroactive effect of annulment applies as soon as the annulment decision is rendered. From 20 September 2003, Mr. Y... therefore no longer had the status of managing agent, and he could not validly convene the general meetings of 25 June 2004 and 3 June 2005.
In short, the High Court establishes a clear rule: a managing agent whose appointment has been annulled retroactively can no longer exercise any prerogative linked to his function, including convening general meetings. This reasoning applies even if the managing agent is unaware of the annulment or if it is subject to appeal. How then to react when you discover that a meeting has been annulled?
What this changes for you — concretely
This decision has immediate practical implications for all real estate stakeholders. If you are a co-owner in Tarnos or elsewhere in the Landes, you must understand that the annulment of a general meeting can have cascading consequences.
For the landlord co-owner who rents out their property: imagine your co-ownership votes on facade renovation works at a meeting convened by a managing agent whose appointment was subsequently annulled. The decisions of this meeting could be challenged, calling into question the financing of the works. undefined, I have encountered cases where co-owners found themselves having to repay provisions for works already carried out, because the meeting that voted on them was tainted by nullity.
For the tenant: you might see service charges revised downwards if the decisions of the general meeting that set them are annulled. But be careful: this can also create instability in the building's management.
For the purchaser of a co-ownership unit: before buying, check the regularity of the latest general meetings. If a meeting that appointed the current managing agent has been annulled, all decisions taken since could be challenged. What few people know is that this can affect the property's value.
For the professional managing agent: this decision imposes increased vigilance. If your appointment is challenged, you must immediately suspend the exercise of your functions until the situation is clarified. Continuing to convene meetings or take decisions exposes you to cascading annulments.
Realistic numerical example: in a co-ownership of 20 units in Mont-de-Marsan, if a meeting that voted for €50,000 of works is annulled, each co-owner might have to repay their share, i.e., about €2,500 on average. Not to mention legal fees to regularise the situation.
Four tips to avoid this type of dispute
- Systematically check the regularity of notices: before each general meeting, ensure that the managing agent convening it was indeed appointed at a regular meeting. Request the minutes of the meeting that appointed him.
- Act quickly in case of formal defect: if you notice an irregularity in the appointment of the managing agent (such as the absence of a separate account), object within 2 months following the meeting. After this period, the action for annulment becomes more difficult.
- Document all decisions: carefully keep the general meeting minutes, notices, and supporting documents for all important decisions. These documents will be essential in case of challenge.
- Consult a professional at the first doubt: if you suspect an irregularity in the appointment of your managing agent, quickly seek advice from a specialised lawyer. Early consultation can avoid years of litigation.
Besoin d'un conseil personnalisé ? Contactez Maître Zakine — première consultation 30 min à 45€.
Deep dive: related case law and developments
This 2009 decision fits into a consistent line of case law from the Court of Cassation on the retroactive effect of annulment. Already in 1995, in a famous judgment (Cass. 3rd civ., 15 March 1995, no. 93-15.789), the High Court had affirmed that 'the annulment of a general meeting automatically entails the annulment of all resolutions taken at it'.
More recently, in a judgment of 14 December 2016 (no. 15-25.418), the Court of Cassation specified that this retroactive effect applies even when the annulment occurs several years after the meeting. The trend of the courts is clear: they are increasingly strictly protecting the formal regularity of general meetings.
What this means for the future? Co-ownerships will have to be even more attentive to scrupulously respect the formalities for convening and appointing the managing agent. Professional managing agents, for their part, will have to strengthen their internal procedures to avoid any formal defect. But does this legal rigour not risk paralysing the functioning of co-ownerships?
In practice: what to do
If you discover that the meeting that appointed your managing agent has been annulled:
- Immediately suspend any payment of provisions for service charges or works voted at subsequent meetings
- Convene an extraordinary general meeting as soon as possible to appoint a new managing agent
- Have important decisions (works, loans) regularised retroactively by the new meeting
- Consult a lawyer to assess the risks of claims from dissatisfied co-owners
- Carefully document the entire regularisation procedure
Before this decision / After this decision:
Before: it was often considered that the managing agent could continue to exercise his functions during appeals.
After: any retroactive annulment of a meeting immediately calls into question the legitimacy of the managing agent.
Do you find yourself in a similar situation? A first 30-minute consultation with Maître Zakine (€45) can save you months of litigation — and often much more. Book an appointment →

