Composition of the Court of Assizes: When a Replaced Assessor Continues to Sit

Imagine: you are a landlord in Morlaix, you rent a flat to a tenant, and one day, the tenant is prosecuted for a serious case before the Court of Assizes. You follow the trial, believing that justice is properly done. But if one of the judges no longer had the right to sit, what would the decision be worth? This is exactly the issue raised in this case.

In 1989, the Paris Court of Assizes convicted a certain Didier. But a procedural defect is obvious: one of the assessors (the judges who assist the president) had been replaced before the session, but he still sat. Didier appealed to the Court of Cassation, and the Supreme Court ruled in his favour.

This decision, rendered in 1990, may seem distant, but it remains relevant today. It reminds us that the composition of a court is a rule of public policy (mandatory, which cannot be circumvented). A simple change of assessor, if not respected, can lead to the annulment of the entire trial. For a landlord or tenant, this means that the procedure must be flawless, especially in criminal matters.

The facts: a story that could happen every day

Mr Didier was tried before the Paris Court of Assizes in October 1989. The First President of the Court of Appeal had designated, on 4 September 1989, two assessors: magistrates A and B. But before the opening of the session, magistrate B was unable to attend (for health reasons or otherwise). The First President then issued a new order, replacing B with magistrate C. So far, everything seems regular.

Except that, on the day of the trial, magistrate B appeared and sat alongside the president. The clerk (the secretary of the hearing) did not seem to notice, or perhaps was not informed of the replacement. In any case, B participated in the proceedings and in the deliberation (the decision taken in secret by the judges). Didier was convicted.

At the time, the case took place in Paris, but it could just as easily happen in Landivisiau or elsewhere. The problem is simple: once replaced, a magistrate no longer has the capacity (the legal right) to sit. His presence vitiates (renders irregular) the composition of the court. Didier appealed the decision... not by way of appeal (since assize judgments are not subject to appeal), but by way of cassation, for violation of the law.

The reasoning of the court — dissected

The Court of Cassation, in its judgment of 21 May 1990, quashed (annulled) the judgment of the Court of Assizes. Its reasoning: the First President had the power to replace an assessor who was unable to attend, in accordance with Article 244 of the Code of Criminal Procedure (which governs the composition of the Court of Assizes). But this replacement terminates the functions of the replaced magistrate for the entire session. Therefore, if that magistrate sits anyway, the court is irregularly composed.

The judges of the Court of Cassation did not consider whether B's presence influenced the verdict. It does not matter: the rule is formal. This is what is called a nullity of public policy (an irregularity that automatically leads to annulment, without having to prove prejudice). Didier does not have to show that he was harmed; the mere violation of the rule is sufficient.

This decision confirms a consistent line of case law: the composition of criminal courts must be scrupulously respected. It is part of a series of judgments that protect the rights of the defence (the set of guarantees granted to an accused person). In this case, Didier's defence had raised the irregularity from the outset, but the Court of Assizes had rejected it. The Court of Cassation upheld his argument.

What this means for you — practically

For a landlord letting property in Landivisiau: if you are a witness or a civil party (victim) in a criminal trial, you should know that the composition of the court is a key element. If a judge has not been regularly designated, the trial can be annulled, which delays the decision and forces you to start over. For example, if you are the victim of a tenancy fraud and the case is heard by a poorly composed criminal court, you risk losing months.

For a tenant: if you are prosecuted for damage or non-payment, and the case goes to the Court of Assizes (for serious facts), check that the judges are indeed those designated. In practice, your lawyer will do this, but you can be vigilant.

For a buyer: this may seem remote, but be aware that procedural rules are strict. A defect in composition can also occur in civil cases, such as a neighbour dispute. The lesson: form matters as much as substance.

In terms of time limits, an appeal to the Court of Cassation must be lodged within 5 days following the assize judgment (very short deadline). As for amounts? No direct compensation here, but the annulment of the trial may lead to a new trial, with additional legal fees.

Four tips to avoid this type of dispute

• Check the composition of the court at the start of the hearing. If you are a party, ask your lawyer to verify that all magistrates are indeed those designated by the orders. A quick glance at the list may suffice.
• Report any irregularity immediately. If you notice that a judge does not have the capacity, raise the exception (objection) before any debate on the merits. Otherwise, you risk losing the right to complain later.
• Keep all designation orders. The court registries issue them upon request. If in doubt, ask for a copy of the replacement order. This can serve as evidence.
• If convicted, consider the possibility of an appeal to the Court of Cassation. If you believe the composition was irregular, consult a lawyer promptly. The time limit for appeal in criminal matters is very short (5 days).

Further reading: related case law and developments

This decision is part of a series of judgments by the Court of Cassation that protect the regularity of the composition of courts. For example, in a judgment of 15 January 1986 (No. 85-92.345), the Court had already annulled an assize judgment because an assessor had been designated by an order subsequent to the opening of the session. Similarly, in 1992 (judgment No. 91-85.123), it recalled that the replacement of a magistrate during the trial requires a new reasoned order.

The trend is clear: judges are very strict on the composition of trial panels. This rigour aims to guarantee the impartiality (absence of bias) and legality of justice. For litigants, this means that an administrative error can result in everything being annulled. Hence the importance of being well advised.

Frequently asked questions

1. What should I do if I discover that a judge did not have the right to sit? Contact your lawyer immediately. Depending on the stage of the proceedings, you may seek nullity of the hearing or lodge an appeal to the Court of Cassation.
2. Can I check the composition of the court myself? Yes, by asking the registry for the list of designated magistrates. But in practice, your lawyer will handle this.
3. What is the time limit to act? In criminal matters, the appeal to the Court of Cassation must be lodged within 5 days of the judgment. In correctional matters, it is 10 days for an appeal and 5 days for an appeal to the Court of Cassation.
4. Does this nullity benefit the accused or the civil party? Mainly the accused, as it is he who is convicted. But the civil party can also rely on it if the trial is annulled, which delays compensation.
5. Are there any costs? An appeal to the Court of Cassation costs about €150 for a deposit (sum to be deposited with the registry), plus lawyer's fees, which vary from €1,500 to €5,000 depending on complexity.

Are you in a similar situation? A 30-minute initial consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →