Adultery & divorce detective in Paris

Written by Guillaume Pouillier, CNAPS-licensed private detective, licence no. AGD 095-2024-03-06-20190240581 · Last updated: July 9, 2026

Doubt is sometimes more destructive than truth. When a separation looms, proof of adultery can be decisive, legally and financially. Our CNAPS-licensed detectives operate in Paris and its region to establish facts enforceable before the family court judge.

What the law allows

Fault-based divorce (art. 242 of the French Civil Code) requires proof of a serious breach of marital duties. A private detective’s report has been a lawful means of evidence since the Court of Cassation’s landmark ruling of 7 November 1962, provided it is obtained fairly and proportionately: never through intrusion into protected privacy.

What we can establish

• The reality and regularity of an extramarital relationship
• The identity and context of the person involved
• A revealing lifestyle or expenses
• Elements useful to the liquidation of the matrimonial property

How the investigation unfolds

After a free and confidential consultation, by phone or at our rue de la Paix office, we define a precise objective, duration and budget, formalised in a written mandate. The surveillance is conducted with absolute discretion. You receive a time-stamped, illustrated, court-admissible report.

One requirement: legality

An unlawfully obtained report is not only useless, it can turn against you. Never try to gather evidence yourself by searching a phone or planting a tracker: these are criminal offences. Our value lies precisely in producing solid, admissible evidence.

Frequently asked questions