Evidence gathered with method and discretion, built to stand up in court.
For over 15 years, ADN Investigation has been conducting civil, family, criminal, commercial and employment-law investigations in Lille, Bersée and across the region, with an in-house team of CNAPS-licensed investigators.
What we do
ADN Investigation conducts investigations, inquiries and intelligence-gathering locally, nationally and internationally — for individuals as well as for businesses through our Professionals division, dedicated to economic intelligence.
We help individuals gather admissible evidence for civil proceedings — divorce, child custody, protection of minors — or for criminal matters.
A team of investigators based in Lille and Bersée, working directly with lawyers and court officers to build a solid, usable case file.
Our values
The law is the foundation of our profession; ethics and professional conduct are its cornerstones.
- Client confidentiality, from the very first phone call
- Close cooperation with legal professionals
- Complete independence, with no conflict of interest
- Billing based on actual time spent, never an inflated flat fee
- Real local presence — offices in Lille and Bersée
Our commitments
ADN Investigation commits to every client to:
- Assign a full team, never a single isolated investigator
- Clearly explain every step of the investigation
- Provide a precise, transparent quote before any work begins
- Stay available on a schedule that fits your needs and budget
- Liaise directly with your lawyer whenever needed
What we handle
See our rates →Civil & family cases
- Locating missing persons
- Adultery and marital desertion
- Child custody and support review
- Pre-marital background checks
- Protection of minors
Criminal cases
- Independent criminal counter-investigation
- Fraud and abuse-of-weakness prevention
- Building admissible evidence
- Coordination with defence lawyers
Your private investigation agency
Founded in Lille more than 15 years ago, ADN Investigation provides a team of private investigators who gather intelligence and produce a report that stands as evidence in civil, family or criminal matters.
Our two offices — Lille and Bersée — cover the Nord-Pas-de-Calais and Picardy regions, with the ability to operate across France and internationally, either directly or through our partner network.
Licensed and authorised by CNAPS (the French Ministry of the Interior's regulator for the private security sector), member of SNARP, founding member of ADI, and member of the CII — a network that lets us respond quickly anywhere in France and internationally.
