L 134-13
The article under which the agent loses the termination compensation where the termination is justified by its serious breach.
Restrictive
Serious breach is appreciated very restrictively by the courts, and the burden of proving it rests on the principal.
The letter
A serious breach not stated in the termination letter, and discovered afterwards, does not defeat the compensation.

What is serious breach ("faute grave") in a French commercial agency?

Serious breach ("faute grave") is conduct of a commercial agent grave enough to deprive it of the protection French law gives on termination. Under Article L 134-13 of the French Commercial Code (Code de commerce), the agent loses the right to the termination compensation where the termination is justified by its serious breach. And under Article L 134-11, no notice is due where the contract is ended for serious breach. Serious breach is therefore the principal's only route to ending an indefinite-term agency immediately and without the compensation that would otherwise be owed — a compensation customarily assessed at around two years of the agent's gross commission.

Because the stakes are so high, serious breach is also the most heavily litigated issue in agency terminations. A principal that wrongly asserts serious breach does not merely fail to avoid the compensation; it ends up owing it in full, plus, where notice was not given, the reparation for the missing notice. Getting the assessment right — before the termination letter is sent — is what separates a clean exit from an expensive dispute.

Serious Breach Is the Only Way Out Without Paying

Outside serious breach (and force majeure), a principal that terminates owes the notice and the compensation, whatever its commercial reasons. Serious breach is the single exception — which is exactly why the courts guard it so narrowly and why a mistaken invocation is so costly.

How French courts define serious breach — and how strictly they apply it

There is no statutory definition of serious breach; the courts supply one. The Cour de cassation defines it as the fault that undermines the common purpose of the common-interest mandate and makes the continuation of the contractual bond impossible (Cour de cassation, chambre commerciale, 15 October 2002; and 29 June 2022, no. 20-13.228). Two features of that test do the work: the fault must strike at the shared purpose of the agency, and it must make carrying on genuinely impossible — not merely inconvenient or disappointing.

Three principles govern how the test is applied. First, serious breach is appreciated very restrictively: the courts start from the premise that the agent keeps its compensation, and serious breach is the exception that has to be made out. Second, the burden of proving serious breach rests entirely on the principal. Third, the parties cannot fix the definition of serious breach in advance by contract; in the absence of a statutory definition, only the judge can characterise a fault as grave (Cour de cassation, chambre commerciale, 28 May 2002, no. 00-16.857). A clause stating that a given breach "constitutes serious breach" does not bind the court.

A further subtlety is that the serious breach is specific to the loss of the compensation. The same fact can justify the termination of the contract without necessarily depriving the agent of its indemnity; a breach can be serious enough to end the relationship yet not reach the threshold that forfeits the compensation (Cour de cassation, chambre commerciale, 21 June 2011, no. 10-19.902). The question is not simply whether the agent was at fault, but whether the fault was grave in the specific sense the case law requires.

The Default Is That the Agent Keeps the Compensation

Approach every case from the position the courts take: the agent is entitled to the compensation unless the principal proves a serious breach that undermined the mandate's purpose and made continuation impossible. Ordinary underperformance, friction, or even a genuine but lesser breach will not clear that bar.

What counts as serious breach by a commercial agent

The faults the courts have accepted as grave share a common thread: a breach of the loyalty that is essential to the common-interest mandate, or conduct that makes the agency unworkable. Recognised examples include the following.

  • Representing a competitor without authorisation. Taking on the representation of a competing undertaking without the principal's consent — a breach of Article L 134-3 — has been treated as serious breach, including where the contract's non-competition obligation was not limited to the exclusive territory (Cour de cassation, chambre commerciale, 8 October 2013, no. 12-24.064).
  • A manifest and generalised disinterest in the mandate. An agent that shows a clear, across-the-board disengagement from performing its mission commits serious breach (Cour de cassation, chambre commerciale, 9 December 2014, no. 13-28.170).
  • Concealing a change of control. Where an agent is a company and the contract made a change of its management or control subject to the principal's approval, failing to inform the principal of that change is a disloyalty constituting serious breach, because it strikes at the loyalty essential to the common-interest mandate (Cour de cassation, chambre commerciale, 29 June 2022, no. 20-11.952).
  • Concealing a distressed financial situation. Deliberately hiding from the principal a seriously deteriorated financial position, or the agent's own insolvency proceedings, in breach of the essential duty of information, is serious breach (Cour de cassation, chambre commerciale, 24 November 2015, no. 14-17.747).

A further recognised case combines two failings: an agent that has practically ceased to render account to its principal and has breached its contractual loyalty. The accumulation of a near-total failure to report and a breach of the loyalty owed under the common-interest mandate has supported a serious-breach finding (Cour d'appel d'Orléans, 20 August 2020, no. 19/02454).

What unites these is not the label of the breach but its effect: each destroys the trust on which the common-interest mandate depends, or leaves the principal unable to carry on the relationship on any sound footing. The gravity is judged by the impact on the mandate, not by how the contract happens to describe the obligation breached.

What does not count as serious breach

The restrictive approach means that a great deal of conduct a principal finds unsatisfactory falls short of serious breach. The most important example is commercial underperformance. A failure to meet the sales targets or quotas set in the contract cannot, in itself, amount to serious breach, because the agent's results depend on the principal's own commercial policy; a shortfall against target — even a substantial one — is not, without more, a serious breach (Cour de cassation, chambre commerciale, and Cour d'appel de Versailles for a turnover 26% below target). The principal must prove a genuine serious breach, not simply disappointing figures.

Other conduct the courts have declined to treat as serious breach, or have required to be examined with care, includes: failing to make certain client visits at the agreed frequency, not keeping the principal informed of changes, not answering requests for information, and declining to attend commercial meetings — these, taken alone, do not characterise serious breach, which must still be proved. Creating a competing company without the principal's consent cannot be treated as serious breach without the court first checking whether the real motive for the termination was the principal's wish to end the agent's commissions, and whether the serious-breach characterisation is disproportionate given, for instance, an insignificant turnover on the competing products (Cour de cassation, chambre commerciale, 21 June 2011, no. 10-19.902). And representing other suppliers is not a fault at all where the contract permitted it (Cour de cassation, chambre commerciale, 19 December 1995), just as a rupture for which responsibility is shared between the parties will not support a clean serious-breach finding (Cour de cassation, chambre commerciale, 26 June 2012, no. 11-19.446).

Treated as serious breach Not serious breach (agent keeps the compensation)
Representing a competitor without the principal's consent (Art. L 134-3) Failing to meet sales targets or quotas, even by a wide margin
Manifest, generalised disengagement from the mandate Missing some client visits, weak reporting, not attending meetings — taken alone
Concealing a change of control subject to the principal's approval Creating a competing company, where the real motive was to cut commissions or the impact was insignificant
Concealing a distressed financial situation or insolvency Representing other suppliers where the contract allowed it; a rupture of shared responsibility

A principal must state the serious breach at the time — and cannot rely on tolerated faults

Two procedural rules decide many serious-breach disputes, independently of the substance of the alleged fault.

The first concerns faults discovered after the event. A serious breach committed by the agent before the termination but discovered afterwards, and not stated in the termination letter, does not deprive the agent of its compensation (Cour de cassation, chambre commerciale, 16 November 2022, no. 21-17.423). This is a change from the position previously accepted, and it is decisive: a principal cannot terminate on other grounds, or on notice, and then produce a serious breach later, once litigation has started, to defeat the compensation. The serious breach must be identified and relied on at the moment of termination.

The second concerns tolerance. Where the principal has tolerated a fault, or has failed to reproach or warn the agent about it, it cannot later invoke that fault to justify the termination and escape the compensation. A principal that lets conduct pass without objection loses the right to treat it as grave when the relationship ends. A related timing point completes the picture: a fault that arises only after the principal has already given notice of termination, during the notice period, will not retroactively convert an ordinary termination into a serious-breach termination, and does not deprive the agent of the compensation (Court of Justice of the EU, 28 October 2010, Case C-203/09). Serious breach has to exist, be relied on, and be stated at the moment the principal ends the contract — not before it in a tolerated form, and not after it as an afterthought.

Name the Serious Breach in the Termination Letter

If a principal intends to rely on serious breach, it must identify that fault in the termination letter and act on it at the time. A fault kept in reserve and produced during the dispute will not defeat the compensation, and a fault the principal previously tolerated cannot be resurrected. The moment of termination is the moment to make the case.

Serious breach can also make the commercial agent liable in damages

Serious breach has a second consequence beyond the loss of the compensation: it can engage the agent's own liability for the harm its fault has caused the principal (Cour de cassation, chambre commerciale, 15 May 2007, no. 05-19.947; and 19 October 2022, no. 21-20.681). Where the agent's serious breach has damaged the principal — by breaching a non-competition obligation, by disloyalty, or by conduct that harms the principal's market — the principal may claim reparation for that damage, over and above being released from the termination compensation.

The two consequences are distinct. The loss of the compensation flows from Article L 134-13; the claim in damages flows from the ordinary law of contractual liability. A principal facing a genuinely serious breach therefore has both a shield (no compensation owed) and, where it has suffered loss, a sword (a claim against the agent) — but each depends on proving the serious breach to the strict standard the case law requires.

Serious breach versus an ordinary fault: only serious breach costs the compensation

The line between a serious breach and an ordinary fault is where most of these cases are decided, because only serious breach forfeits the compensation. An agent that has committed faults which are not grave keeps its full compensation; the courts do not reduce the indemnity in proportion to lesser faults (Cour de cassation, chambre commerciale, 23 September 2008, no. 07-13.338). There is no sliding scale — the agent either has committed a serious breach and loses the compensation, or has not and keeps it in full.

The same all-or-nothing logic protects the agent against a principal's own difficulties. Where economic constraints have pushed the principal to terminate, the agent is still entitled to its compensation; the principal's commercial reasons for ending the relationship, however genuine, are not the agent's serious breach (Cour de cassation, chambre commerciale, 23 June 2004). For a principal, the practical lesson is that half-measures do not exist: unless the conduct clears the high threshold of serious breach, the compensation is owed in full, and lesser complaints — however legitimate — will not reduce it.

This matters most in the common scenario where a principal is simply dissatisfied with an agent's figures. A run of poor results, missed visits and thin reporting may feel, cumulatively, like a serious problem — but unless one of those elements independently reaches the serious-breach threshold, the accumulation of ordinary shortcomings does not, and the court will not add them together to reach gravity it would not find in any of them alone. A principal that terminates on that basis, without a genuine serious breach, owes the full compensation and, if it gave no notice, the reparation for the missing notice as well. Where the conduct is unsatisfactory but not grave, the safer course is to terminate on notice and pay the compensation, rather than stake the outcome on a serious-breach characterisation the court is unlikely to accept.

Relying on serious breach to avoid the compensation: a principal's checklist

Step 1
Does the conduct undermine the mandate and make continuation impossible?
Test the fault against the Cour de cassation's definition, not against the principal's frustration. Loyalty breaches and conduct that destroys trust qualify; underperformance does not.
Step 2
Can the principal prove it?
The burden is entirely on the principal, and the standard is strict. Assemble the evidence before terminating; a contractual clause labelling the breach "grave" will not bind the court.
Step 3
Was the fault tolerated?
If the principal let the conduct pass without reproach or warning, it cannot invoke it now. A previously tolerated fault is spent.
Step 4
Is the serious breach stated in the termination letter?
It must be identified and relied on at the time. A fault discovered later and not in the letter will not defeat the compensation — so make the case at the moment of termination.

Frequently asked questions about serious breach of a commercial agent

What is serious breach ("faute grave") for a French commercial agent?

It is a fault serious enough to undermine the common purpose of the common-interest mandate and make continuing the contract impossible (Cour de cassation, chambre commerciale, 29 June 2022). It is the only conduct of the agent that removes the termination compensation (Article L 134-13) and the notice (Article L 134-11).

Is failing to meet sales targets serious breach?

No — not in itself. Because the agent's results depend on the principal's commercial policy, a shortfall against target, even a substantial one, is not serious breach. The principal must prove a genuine serious breach, not merely disappointing figures.

Can the contract define what counts as serious breach?

No. In the absence of a statutory definition, only the judge can characterise a fault as grave (Cour de cassation, chambre commerciale, 28 May 2002). A clause stating that a given breach is "serious breach" does not bind the court.

Can a principal rely on a serious breach it discovers after terminating?

No, if it was not stated in the termination letter. A serious breach committed before termination but discovered afterwards, and not relied on in the letter, does not deprive the agent of its compensation (Cour de cassation, chambre commerciale, 16 November 2022).

Do lesser faults reduce the agent's compensation?

No. The agent either committed a serious breach and loses the compensation, or did not and keeps it in full. The courts do not reduce the indemnity in proportion to non-serious breachs (Cour de cassation, chambre commerciale, 23 September 2008).

Can the principal also claim damages for the agent's serious breach?

Yes. Serious breach can engage the agent's liability for the harm caused to the principal (Cour de cassation, chambre commerciale, 15 May 2007), separately from releasing the principal from the termination compensation.

Key takeaways

In brief
The only exception (Articles L 134-13, L 134-11): serious breach is the sole conduct of the agent that removes both the notice and the termination compensation.
Narrow definition: a fault that undermines the mandate's common purpose and makes continuation impossible (Cass. com., 29 June 2022), read very restrictively, with the burden on the principal.
What counts: representing a competitor without consent, generalised disengagement, concealing a change of control or a distressed financial situation — loyalty breaches that destroy trust.
What does not: missing sales targets, weak reporting or missed visits taken alone, a competing company where the impact was insignificant, permitted competing lines, a rupture of shared responsibility.
Procedure decides cases: the serious breach must be stated in the termination letter (a fault discovered later does not count — Cass. com., 16 November 2022), and a tolerated fault cannot be revived; the contract cannot define serious breach.
All or nothing: lesser faults do not reduce the compensation (Cass. com., 23 September 2008); serious breach can also make the agent liable in damages (Cass. com., 15 May 2007).

How our French lawyers help with serious breach and agency termination

Serious breach is won or lost before the termination letter is sent

We advise principals on whether an agent's conduct really amounts to serious breach, how to assemble the proof and state it in the termination, and whether a damages claim is available; and we act for agents whose compensation has been refused on a serious-breach ground that does not hold. Where a termination is imminent, we assess the exposure before the letter goes out.

Assess a serious-breach termination

This article is for general information only. It does not constitute legal advice. Whether conduct amounts to serious breach is highly fact-specific and strictly assessed. Contact our French lawyers for qualified advice before terminating for serious breach or contesting a refusal of compensation.