An investigation firm established in 2012, led by Mr. Alexandre LAMARTINI, who holds a Master's degree in Law.

Authorization number 043-2023-04-27-20230312469
Professional license number 043-2023-02-03-20230312469


Surveillance, tailing, scenario

Civ.1er 31/10/2012 "the Court of Cassation recognizes the tailing by a private investigator as a right to evidence"
ECHR 3rd Section 17/01/2019 "An infringement of personality resulting from surveillance of the individual conducted by a private detective may serve overriding interests of public or private order.".

Photographic capture

Contrary to popular belief, the admissibility of the report does not depend on photographic capture, which can only be conducted under certain conditions.

CA Versailles - 03/10/2006 "The report of a private investigator, if it is objective and regular, is admissible even without photos."

The coverage of fees by the opposing party.

Article 700 of the Civil Procedure Code allows the judge to order the losing party to reimburse the costs.

Detailed reports admissible in court

CA Nancy - 05/09/2016 "Reports from private detectives are admissible in court when their submission is indispensable to the exercise of the right to evidence and the infringement is proportionate to the aim pursued."


The Detective and Partners firms are members of the A.D.I. network

The Association of Independent Detectives was born out of the desire to bring together several investigators, independent and experienced, operating across the entire national territory to better meet the specific needs of the legal system's users.

To date, the association comprises18 investigation firms distributed throughout the entirety of France.

What is a Private Investigator?

Although the terms "private detective" or "private law investigator" might be more illustrative to define the profession, the correct term is "Private Investigator."
A private investigator is a professional specialized in the collection of information and evidence, often aimed at solving private or commercial cases. With expertise in surveillance, investigation, and analysis, this agent works discreetly to gather essential intelligence, whether for legal matters, fraud investigations, background checks, or searches for missing persons. Their meticulous approach and strict adherence to confidentiality make them a valuable ally for those seeking answers in complex situations.


Who does the private detective work for?

Private detectives typically work for individual clients or businesses but can also work for public entities.
Individual clients might hire a private detective for personal matters such as suspicion of infidelity in a marriage, searching for missing people, or gathering evidence for family disputes like child custody.
Businesses may employ private detectives to investigate cases of theft, fraud, or unfair competition, to prove fraudulent sick leaves, or to protect intellectual property and trade secrets.
Lawyers and bailiffs might also enlist private detectives to find information (address, employer, bank domiciliation...) to better defend their client.
Lastly, insurance companies can use private detectives to investigate suspicious claims, as in cases of insurance fraud or feigned injuries.

It's important to note that private detectives must operate within the law and are often regulated by local or national legislation.

How the investigations proceed?


The initial contact at Detective and Partners

The first point of contact allows us to verify the feasibility of the investigation both legally (legality, legitimacy, morality) and technically. If the intervention is feasible, the firm then develops the action strategy and decides on the technical means to be implemented to gather intelligence or to facilitate the reporting of evidence admissible in court. The days and hours of intervention are agreed upon together to allow for the preparation of the quote, which is sent by email.


Technical means during the investigations

The thorough examination of the file and the reconnaissance of the locations enable investigators to decide on the action methods to be implemented. Depending on geographical challenges (layout of the area, urban or rural zone), the vigilance of the person under investigation, or their means of transportation (vehicle(s) with powerful engines and/or two-wheelers), the firm may decide to deploy additional agents, including motorcyclists, or to employ specific equipment.


Daily investigation tracking

The firm provides its clients with a link to allow secure access to daily reports. Through this means, you will be able to follow your case, communicate your suggestions on the investigation techniques implemented, or make schedule adjustments. We believe your collaboration is essential, especially if you have proximity to the target, particularly to convey information we may not yet possess.


Detailed reports from our private detectives

At the end of the mission, we provide you with a detailed report recounting all the facts directly related to the mission's objective. This report, with your agreement, is also sent to your lawyer as a draft so that they can indicate the desired modifications in relation to the evidence they wish to highlight in their plea. The reports are precise and can be corroborated by article 202 witness statements or photographs taken in public places.


In France, the admissibility of private detective reports in court follows strict criteria, focused on the legality of the information collection method. According to jurisprudence, these reports are admissible as long as they comply with the law and do not infringe on privacy rights. The Court of Cassation has highlighted in several rulings the importance of legality in evidence collection. For example, in a ruling from November 7, 2000 (Court of Cassation, 1st civil chamber, no. 98-22139), the Court recognized the validity of a private detective's report, emphasizing that surveillance and information collection by a detective did not constitute an unlawful invasion of privacy in itself. This jurisprudence demonstrates that, as long as detectives operate within the legal framework, their reports can be used as evidence, leaving it to the judge to assess their relevance and weight in each specific case. The Court of Cassation first recognized the admissibility of private detectives' reports in a ruling from November 7, 1962. It was established that private detectives' investigation reports could be considered as procedural documents. Since this ruling, the Court of Cassation has consistently upheld its jurisprudence based on the same principle.

Our authorization is controlled by the National Council of Private Security Activities (CNAPS).

Contact form


Please leave your phone number if you would like to be contacted by one of our agents. You can also leave us an email or contact us during the firm's opening hours; we will respond as soon as possible.

Our private detectives answer your questions for free.

Please leave your phone number if you wish to be contacted by one of our agents. You can also leave us an email, and we will respond to you as quickly as possible.
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Protection and processing of collected personal information The Detective & Partners agencies pay particular attention to compliance with the obligations imposed by the National Commission on Informatics and Liberty (CNIL). We assure you that all information collected is stored only for the time necessary to make contact in order to establish a quote. The data processing manager is Mr. Alexandre LAMARTINI. In accordance with the "Information Technology and Liberties" law, you can exercise your right to access the data concerning you and have it rectified by contacting us via email: No personal information collected on the website is: collected without the user-s knowledge published without the User-s knowledge; exchanged, transferred, ceded, or sold on any medium to third parties..


Siret (69) : 532935624 00033

Siret (42) : 532935624 00066

Siret (38) : 532935624 00025

Siret (43) : 532935624 00074


Département 69
Département 42
Département 38
N°AUT-038-2112-07-08-20130337259 Département 43


1 bis chemin des gorges
69570 Dardilly
19, Avenue des Noyers - 38300 Domarin
25 Cours Fauriel - 42100 Saint-Etienne
Bâtiment Le 4 puissance 3 - ZA Chavanon 2 - 43120 Monistrol-sur-Loire


25 Cours Fauriel, 42100 Saint-Etienne
FAX : 0970 805 203

Le centre de médiation de la Consommation de Conciliateurs de Justice
14 rue Saint Jean, 75017 Paris
Représenté par son président Monsieur Alain Yung-Hing.