{"id":11339,"date":"2026-06-16T09:59:26","date_gmt":"2026-06-16T09:59:26","guid":{"rendered":"https:\/\/groupehyperion.com\/lexique\/investigation-report-definition-content-and-legal-value\/"},"modified":"2026-07-30T07:41:12","modified_gmt":"2026-07-30T07:41:12","slug":"investigation-report-definition-content-and-legal-value","status":"publish","type":"glossary","link":"https:\/\/groupehyperion.com\/en\/lexique\/investigation-report-definition-content-and-legal-value\/","title":{"rendered":"Investigation Report: Definition, Content, and Legal Value"},"content":{"rendered":"

At the conclusion of each mission, a private detective provides their client with a structured document that records all observations made in the field. This document is called the investigation report. It is the cornerstone of any investigation: the form taken by the evidence collected, and the element upon which the legal admissibility of the work performed rests. <\/p>\n

However, few people know precisely what it contains or how it is constructed. Here is what you need to know before engaging a professional. <\/p>\n

What is an investigation report?<\/strong><\/p>\n

The investigation report is an official document prepared by a CNAPS-licensed private investigator at the conclusion of a surveillance<\/a>, verification, or investigation mission. It faithfully transcribes the facts observed, the evidence gathered, and the steps taken, in a format that can be used before a court or in the context of a negotiation. <\/p>\n

It is not simply an informal account: it is a professional act engaging the detective’s responsibility, prepared in compliance with the legal framework defined by the law of September 28, 2010, and its implementing regulations.<\/p>\n

What does an investigation report contain?<\/strong><\/p>\n

A rigorous investigation report systematically includes the following elements:<\/p>\n

    \n
  1. Identity of the principal and the agent<\/strong> — the contact details of the client and the detective agency, as well as the CNAPS license number of the agent responsible for the mission.<\/li>\n
  2. Purpose of the mission<\/strong> — the client’s initial request, formulated in a precise and confidential manner.<\/li>\n
  3. Legal framework of the intervention<\/strong> — the legal grounds authorizing the collection of evidence (respect for privacy, personal data, etc.).<\/li>\n
  4. Operations log<\/strong> — the chronological and factual account of observations made in the field, day by day, hour by hour.<\/li>\n
  5. Attached documents<\/strong> — time-stamped photographs, video captures, collected documents, audio recordings under the conditions provided by law.<\/li>\n
  6. Concluding summary<\/strong> — an objective summary of the established facts, without subjective interpretation or value judgment.<\/li>\n
  7. Detective’s certification<\/strong> — agent’s signature, date of preparation, and commitment to the accuracy of the recorded elements.<\/li>\n<\/ol>\n

    What is the legal value of an investigation report?<\/strong><\/p>\n

    This is the question most clients ask before launching a mission. The answer is clear: an investigation report prepared by a licensed private detective constitutes admissible evidence<\/a> before French courts. <\/p>\n

    The Court of Cassation has confirmed this on several occasions. Trial judges freely assess the probative value of the evidence produced, but investigation reports prepared according to professional standards are regularly accepted in civil, labor, and commercial proceedings. <\/p>\n

    The essential condition: that the report has been prepared in a lawful manner, without trespassing, without unlawful stratagems, and in compliance with the right to privacy as protected by Article 9 of the Civil Code and the provisions of the GDPR.<\/p>\n

    Investigation report and surveillance<\/a> report: what is the difference?<\/strong><\/p>\n

    The surveillance<\/a> report is a particular type of investigation report, focused on the movements and behavior of a person observed in public spaces. It is frequently used in cases of marital infidelity, insurance fraud, or monitoring of employees on sick leave. <\/p>\n

    The investigation report, in the broad sense, can cover more varied investigations: verification of solvency, background checks, address searches, industrial counter-espionage, or detection of surveillance<\/a> devices. In all cases, the formal rigor of the document is identical. <\/p>\n

    Who can prepare an investigation report?<\/strong><\/p>\n

    In France, only a private detective holding a license issued by the CNAPS (National Council for Private Security Activities) is authorized to conduct private investigation missions and produce an enforceable investigation report.<\/p>\n

    Engaging an unlicensed service provider exposes the client to having their evidence rejected by the court — and the service provider to criminal prosecution. Verification of the CNAPS license is therefore an essential prerequisite before any engagement. <\/p>\n

    Key Takeaways<\/strong><\/p>\n

    The investigation report is much more than an administrative document. It is the culmination of an investigation mission conducted lawfully, and the tool that transforms observed facts into usable evidence. Its editorial quality and legal compliance are directly linked to the professionalism of the agency engaged. <\/p>\n

    At Groupe Hypérion, each report is prepared by CNAPS<\/a>-licensed agents, with documentary standards adapted to the requirements of French courts. Would you like to learn more about our services or obtain a confidential quote? Contact us. <\/p>\n

     <\/p>\n

    FAQ — Investigation Report<\/strong><\/p>\n

    Is a private detective’s investigation report accepted in court?<\/strong> Yes, provided it has been prepared in compliance with the legal framework. Reports produced by CNAPS-licensed detectives are admissible before civil, labor, and commercial courts. <\/p>\n

    How long does it take to receive an investigation report?<\/strong> The timeframe depends on the nature and duration of the mission. It is generally provided within days following the completion of field operations. <\/p>\n

    Is the investigation report confidential?<\/strong> Yes. It is provided exclusively to the principal and covered by professional secrecy. Its disclosure to third parties can only occur in the context of legal proceedings, at the client’s initiative. <\/p>\n

    Can an investigation report be used in divorce proceedings?<\/strong> Yes. Reports establishing facts of adultery or prejudicial behavior are regularly produced in fault-based divorce proceedings, provided they comply with the rules for lawful evidence collection. <\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"

    At the conclusion of each mission, a private detective provides their client with a structured document that records all observations made in the field. This document is called the investigation report. It is the cornerstone of any investigation: the form taken by the evidence collected, and the element upon which the legal admissibility of the...<\/p>","protected":false},"author":1,"featured_media":0,"menu_order":0,"template":"","meta":{"footnotes":""},"class_list":["post-11339","glossary","type-glossary","status-publish","hentry"],"yoast_head":"\nInvestigation Report: Definition, Content, and Legal Value<\/title>\n<meta name=\"description\" content=\"The investigation report is the official document provided by a private detective at the conclusion of a mission. 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