Occupational disease and last employer: when the burden of proof shifts

Imagine: you own a small building in Rethel, and your tenant, a worker in a paper mill, develops occupational deafness. He sues his last employer, but the employer claims the noise came from his previous job with another industrialist. Who must pay? The issue is as pressing for employers as it is for employees.

This decision of 21 October 2010 by the Court of Cassation answers: the occupational disease is deemed to have been contracted in the service of the last employer with whom the victim was exposed to the risk, before its medical diagnosis. In other words: the last employer is presumed liable, unless it proves the disease was due to working conditions at previous companies. A simple presumption, but one with heavy consequences.

So, how does this translate in practice? And what should you do if you are affected, whether you are an employee in Épernay or an employer in the Marne? Let us delve into the details of this case.

The facts: a story like many others

It all starts with an employee, Mr Y., hired by the company Smurfit Kappa in Reims as a production worker. For years, he works in a workshop where ambient noise exceeds regulatory thresholds. In 2003, an occupational physician diagnoses occupational deafness. Mr Y. reports the disease to the CPAM (social security fund), which accepts it. But Smurfit Kappa contests: according to it, the employee had been exposed to noise hazards with his previous employers, particularly in another factory in Rethel.

The dispute comes before the social security tribunal. The regional health insurance fund, after investigation, establishes that the noise levels measured at Smurfit Kappa in February 2003 exceeded 85 decibels, making the wearing of hearing protection mandatory. But Smurfit Kappa argues that Mr Y. already had hearing loss before his hiring, and that his current position was not the sole cause.

The Court of Appeal of Reims rules in favour of the employer: it holds that the disease may be attributable to several employers, and that the CPAM did not prove that the last employer was solely responsible. In its view, the presumption does not apply if the employee was exposed before. A logical reasoning, but not in accordance with social security law.

The CPAM appeals to the Court of Cassation. And the Supreme Court quashes the judgment: it recalls that, under Article L. 461-1 of the Social Security Code, an occupational disease is presumed to have been contracted in the service of the last employer with whom the victim was exposed to the risk, before the medical diagnosis. It is for that employer to prove otherwise, not for the fund.

The reasoning of the court — explained

The heart of the debate: who bears the burden of proof? The Court of Cassation rules in favour of a simple presumption, but reversed. Concretely, as soon as an employee has been exposed to the risk (here, noise) with his last employer, and the disease is medically diagnosed, it is considered that this last employer caused it. The employer can exonerate itself by proving that the disease comes exclusively from previous working conditions.

This is not a revolution: the case law was already well established. But the decision of 21 October 2010 clarifies a crucial point: the presumption applies even if the employee was exposed with several employers. Previously, some appeal courts required exclusive exposure with the last employer. Now, any exposure, even partial, is sufficient. A rhetorical question: who can prove that the noise in a workshop did not aggravate pre-existing deafness?

The Court relies on Article L. 461-1 of the Social Security Code, which provides that an occupational disease is presumed to be of occupational origin unless proven otherwise. It adds that this presumption applies to the last employer, because it is the one who controls the working conditions at the time of diagnosis. The judges rejected Smurfit Kappa's argument that the CPAM had to prove the absence of prior exposure. Wrong move: the burden of proof lies with the employer.

This analysis confirms a protective trend for employees, but it is not absolute. The employer can still defend itself by producing old acoustic measurements, medical certificates before hiring, or expert assessments establishing that the risk was negligible at its premises.

What this means for you — in practice

For the employee (or their dependants): You no longer have to prove that your last employer is liable. If you were exposed to the risk (noise, asbestos, chemicals) with that employer, and the disease is declared within the legal time limits, the CPAM recognises it as occupational. The employer must then contest, often in court. Example in Épernay: a vineyard worker exposed to pesticides develops cancer. His last employer, a vineyard, will have to prove that the cancer came from a previous farm.

For the employer: The burden of proof is on you. Keep all job descriptions, health and safety measurements, and records of personal protective equipment use. If you hire an employee who has previously worked in high-risk sectors, have a complete pre-employment medical examination carried out to establish a baseline. A lack of monitoring can be costly: the cost of an occupational disease can reach €100,000 in additional contributions.

For landlord owners: You are not directly concerned, but if you lease premises to a company, ensure it complies with safety standards. An employee could sue you for breach of the duty of safety, especially if you own industrial buildings.

In practice, if you are an employee in Rethel and notice symptoms (deafness, asthma, dermatitis), report your disease to the CPAM within 15 days of the medical diagnosis. Do not wait: the limitation period is two years.

Four tips to avoid this type of dispute

• Carry out a systematic pre-employment medical examination – Before hiring an employee exposed to a risk (noise, dust, chemicals), the occupational physician must establish a precise baseline. Keep this document: it will be your best defence if the employee later develops a disease.
• Measure exposure levels and keep a register – For noise, vibrations, dust, have measurements taken by an approved body. Maintain a single risk assessment document (DUER). These technical pieces of evidence can reverse the presumption.
• Train your employees in the use of protective equipment – Wearing earplugs or masks must be mandatory and monitored. An individual monitoring sheet signed by the employee is solid evidence.
• Report any accident or suspected disease at the first signs – Do not delay. A late declaration may be contested by the CPAM, and the employer may be accused of negligence.

Further reading: related case law and developments

This decision is part of a consistent line: the judgment of 28 February 2008 (No. 06-18.757) had already established the principle for asbestos. The Court of Cassation there held that the presumption of attribution to the last employer applies even if the employee was exposed previously. Here, it extends that reasoning to noise.

A more recent decision, of 13 September 2018 (No. 17-16.873), however, qualifies: if the employee was only exposed for a very short time with the last employer, and the disease is typical of long-term exposure (e.g., silicosis), the employer can more easily prove the prior origin. The courts look at the duration and intensity of exposure.

The trend is therefore favourable to employees, but the balance remains subtle. In future, we can expect employers to increase medical assessments and environmental measurements to protect themselves. Social security law is moving towards individualisation of proof.

Key takeaways

FAQ

• Who is presumed liable for my occupational disease? The last employer with whom you were exposed to the risk, even if you worked elsewhere before.
• What should I do if I develop a disease after leaving my last job? Report it to the CPAM within 15 days of diagnosis. The contesting employer will have to prove that your disease is not due to its position.
• Can my employer refuse to report the disease? Yes, but you can report it yourself. The CPAM will investigate and, if it recognises the occupational disease, the employer will have to pay additional contributions.
• What are the time limits for contesting? The employer has 30 days after receiving the CPAM's decision to refer the matter to the friendly settlement commission. After that, it may take legal action within two years.
• Can I receive compensation if my employer proves the disease came from before? Yes, but from the CPAM under occupational disease provisions. The previous employer may be brought into the proceedings, but that is more complex.

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 →