Background
On June 7, 2024, the Prefect of Gironde applied under Article L. 229-1 of the Internal Security Code for authorization to search Mme [H] [N]’s home and vehicle and seize items solely to prevent acts of terrorism. A liberty and detention judge authorized the operations on June 14, and officials conducted them on June 20, seizing several objects.
Mme [N] appealed the authorization and challenged the conduct of the search-and-seizure operations. The first president of the Paris Court of Appeal affirmed the authorization and rejected her challenge on May 19, 2025. Before the Court of Cassation, she principally argued that the appellate judge could not rely on a supplemental “white note”—an unattributed intelligence-services report—first produced by the administration on appeal to clarify an allegedly imprecise note submitted to the original judge.
The Court’s Holding
The Criminal Chamber rejected the appeal. It reaffirmed that an administrative application may rest exclusively on an intelligence-services note when the reported facts are precise and detailed. The liberty and detention judge must assess only the factual material presented, without interpretation or extrapolation, while an appellate judge facing a serious challenge may invite the administration to submit useful supporting material.
The Court held that this authority does not prevent the administration from submitting supplemental information on its own initiative during the appeal. Such material may be considered if it serves only to clarify facts already stated in the original application and is subjected to adversarial proceedings. Here, no one alleged that the supplemental note introduced distinct facts, and Mme [N] had an opportunity to address its contents in her written submissions and at the hearing. The appellate judge therefore properly considered it. The Court found the remaining grounds insufficient to warrant admission and upheld the order in full.
Key Takeaways
- A counterterrorism search application may rely solely on an intelligence-services note if it contains precise and detailed facts.
- The administration may voluntarily introduce supplemental information on appeal when it only clarifies facts supporting the original application.
- Considering supplemental material requires an adversarial process in which the affected person can contest its contents.
Why It Matters
The ruling clarifies the evidentiary framework governing appellate review of preventive counterterrorism searches in France. It permits intelligence underlying a search authorization to be clarified on appeal without treating the clarification as an impermissible replacement for the original factual basis, provided that no distinct facts are introduced and the person searched receives a meaningful opportunity to respond.