🔍 How to prove infidelity legally and effectively in France

Do you suspect your partner of infidelity and wonder how you can obtain concrete proof? Calling in a private investigator for adultery is now one of the most reliable, discreet and legal methods of removing doubt. Whether you are in the process of separating or divorcing, or simply looking for the truth, a private investigator can help you build a case that will stand up in court, without violating your privacy.

In this article, we explain everything you need to know before hiring a private detective for adultery: how they work, what the law says, how much it costs, what evidence can be used, and above all how to choose a professional you can trust. This guide is based on the field experience of My Own Detective, a CNAPS-approved agency specialising in private investigations in France. It also answers the many questions asked by victims of marital betrayal who are looking for a solution that is legal, fast and confidential.

✅ Introduction

Infidelity within a couple can have serious personal, family and legal consequences. When doubt arises, it is sometimes necessary to call in a private detective to obtain evidence that can be used in court.

👉 This guide, offered objectively by the My Own Detective agency, helps you understand :

Legitimate reasons for using a private detective in cases of adultery
Legal procedure and ethical limits
Costs, admissible evidence and effects on a divorce
Your rights as an individual

🔎 Why call in a private detective for adultery?

1. Confirming or refuting suspicions

A change in behaviour, repeated absences, a double digital life… These are all signs that can give rise to doubts. Rather than sinking into paranoia or self-monitoring, consulting a professional can help youassess the situation objectively.

2. Obtaining evidence admissible in court

In the event of a fault-based divorce, evidence of adultery must be obtained legally and without invasion of privacy. An accredited private investigator can help you put together a solid, compliant dossier.

⚖️ See also: Article 242 of the Civil Code on divorce for fault

🧑‍⚖️ Is it legal to investigate your spouse?

Yes, under certain specific conditions:

The investigation must be proportionate to the aim pursued
No invasion of privacy (no microphones, no digital intrusion, no illegal geolocation)
The detective must be approved by the CNAPS (Conseil National des Activités Privées de Sécurité – National Council for Private Security Activities)

❌ Filming or geolocating a spouse without their consent is prohibited, even if you own a shared asset (car, phone).

🛠️ What resources does a private detective use?

The detectives at My Own Detective use legal and discreet methods, such as :

Visual surveillance in public spaces
Following (vehicle, pedestrian, public places)
Photo/video report with date and location
Search for information (social networks, business trips, etc.)

They do not hack into telephones, email accounts or social networks, which is punishable by 5 years’ imprisonment (articles 226-1 to 226-4 of the Criminal Code).

📁 Is the evidence admissible in court?

Yes, if obtained legally and proportionately, evidence provided by a private detective is admissible:

As part of divorce proceedings
Before a family affairs judge (JAF)
To support a claim for pension or childcare

Investigation reports may be accompanied by :

Dated photographs
Objective testimonies
A signed mission report

💰 How much does a private investigator for adultery cost?

Prices vary according to :

The duration of the investigation (tailing over several days? at set times?)
The number of investigators mobilised
Geographical location

👉 Simulate your mission on MyOwnDetective.io – response in less than 24 hours.

📍 How does the mission work?

1. Initial contact (anonymous or not)

You can describe your situation on the form, by telephone or videoconference.

Confidential contact form

2. Personalised quotation

You will be given a detailed quotation, with or without an immediate commitment.

3. Signing of an investigation contract

In accordance with the law, every assignment begins with a signed contract setting out the objective, the limits and the legal framework.

4. Deployment and reporting

The detective will carry out the assignment with the utmost discretion and will provide you with a final report with arguments and a date.

🔐 Confidentiality & ethics

A private detective is bound by professional secrecy (article 226-13 of the French Penal Code).

All your data are :

Encrypted
Not shared
In accordance with the RGPD

At My Own Detective, each assignment is tracked but never stored for longer than necessary. You can request the complete deletion of your data after the assignment.

💬 FAQ : Frequently asked questions

➤ Will my partner know that I had him watched?

No. The aim is absolute discretion. You remain the detective’s only contact.

➤ Can you investigate someone without their consent?

Yes, in a public space and without intrusion. Stalking is legal, as long as it complies with the law.

➤ What happens if no evidence of adultery is found?

The report will mention this. This information can also be used to support good faith or to confirm an unfounded suspicion.

➤ Can this affect childcare?

Indirectly, yes. Risky behaviour (nightlife, prolonged absences, instability) can be a factor in a custody decision.

➤ Can I pay in instalments?

Yes, My Own Detective offers payment facilities depending on the length of the assignment.

🔗 Useful resources

🎯 Conclusion: Why choose My Own Detective?

My Own Detective guarantees :

A 100% legal, confidential and documented investigation
Rapid response throughout France
Access to a legal report that can be used in court

👉 Discover our Adultery & Privacy Investigation service :

🔗 https://myowndetective.io/services/enquete-adultere

Discover more from My Own Detective – Agence de Détectives Privés en France & Suisse

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✅ Introduction

🔎 Why call in a private detective for adultery?

1.

Confirming or refuting suspicions

2.

Obtaining evidence admissible in court