Private investigator in Lille
For nearly 20 years, Investipole has been supporting individuals, companies and lawyers in Lille and its region. Your private detectives conduct investigations, discreet surveillance and research to establish verifiable facts, recorded in a report for your lawyer.
Investipole Detective Private Lille · Metropole
Private detective in Lille: establish the facts, prepare the case
Each assignment addresses a specific question: proving an affair, establishing non-compliance with visitation rights, verifying a sick leave or demonstrating unfair competition. In the field, your private detectives in Lille operate solely in public spaces, without wiretaps or trackers, and never inside private premises. Observations are compiled into a precise, timestamped and illustrated report. This report can be submitted to court; the judge assesses its value.
Discretion is absolute from your first call: professional secrecy applies, and your file remains confidential. The analysis of your request and the estimate are free; you generally receive a response within 24 hours. Appointments take place at 3 boulevard de Belfort, the headquarters of your private investigation agency in Lille, at the address shown in our contact details.
Family · Couple · Assets
Private detective in Lille for infidelity, divorce and custody, from Old-Lille to Wazemmes
Infidelity and marital fault in Lille
- discreet surveillance on foot
- Meetings noted
- Timed cliches
Shared custody & visitation rights
- Discount hours
- Adult present
- A sober report
Child support & compensatory payments
Declared income null, but undeclared activity, business managed covertly or high standard of living: the former spouse’s actual situation skews the discussion. Your detectives gather lawful evidence, which the judge will rely on to determine child support or divorce financial settlement.
- Undeclared earnings
- Apparent goods
- Visible expenditure
Other personal records
Harassment, violence, hidden microphones: facts rather than impressions
Software or hidden microphone, insistent presence around you, brutal departure of the spouse, disputed inheritance: these files require a method adapted to the place. Your detective agency in Lille intervenes both in a running house and in an apartment in the center, with a perimeter fixed in writing. In case of danger, call immediately on 17; the 3919 listens to victims of domestic violence free and anonymously.
Business · HR · Legal Directorates
Lille detective for businesses, from Euralille to EuraTechnologies
Euralille seats, start-ups of EuraTechnologies, EuraSanté laboratories, shops and warehouses in the metropolis: everywhere, the same risks weigh on the activity. Stop working complacency, misappropriation of customers, unexplained stock losses require proof before any sanction. Your detectives document these facts without ever inciting anyone to the offence.
Sick leave and harm
Employee presence and activity
Unfair competition & customers
Missing goods and fraud
Individuals · Debtors · Companies
Finding a relative, debtor or partner through Lille
The Belgian border is very close, and a person can change country without changing daily. Your private investigation agency in Lille checks first the legitimacy of your procedure. The information available legally is then cross-checked, then checked on site when the person is in France.
Lost touch with a loved one
The search is limited to the reason stated in the written agreement; the localized person retains the right not to reconnect.
Fugitive debtor
Solvency
Before a summons or negotiation, your detectives consider what the opposing party can actually pay on the basis of lawful information.
Business partner
Supplier, owner or partner: your detectives check that the activity exists, who directs it and whether the information transmitted matches.
Legal framework
A private investigation at Lille, conducted according to the law
"Nothing is found that cannot be shown to a judge."
A legitimate goal
To have a right recognized, to prepare for litigation, to check a fact discussed: the objective is black on white in the written agreement.
Lawful methods
No interception of communications, no hidden tracer, no intrusion into a home or illegal access to files.
Limited surveillance
The time windows, duration and places of observation are adjusted to the strict need for the file.
Evidence and proportionality

Why Investipole in Lille?
An agency right in the centre, close to the courthouse
Time, place, photograph: every fact is reported exactly as your detectives observed.
Metro, tram, peripheral, motorways to Belgium and the coast: the discreet surveillance plan takes them into account.
Your identity and the contents of the file are communicated only to the persons you authorize.
Legal network
Your lawyer with you every step of the way
Commissioner of Justice
Law Society
Experts
Conduct
From your call to the final report
You are kept informed at each stage, without commitment prior to signing the written agreement.
Interview
You describe the situation and the fact to be established; the request is accepted only if its reason is legitimate.
Mandate
What you expect, the means chosen, the limits and the price: everything appears in a written agreement, preceded by a free quotation.
Kick-off
Investigations begin after a down payment is made, usually 50%.
Observation
Your detectives in Lille follow the established procedure and keep you informed of any important developments.
Report
A chronological report, illustrated with photographs, is given to you for your lawyer.
Means
Metro, tram and highways: means built for the city
The arrangement depends on the expected route: a detective on foot, several vehicles, or both.
Tailings on foot and by car
In the pedestrian streets of the centre, on the peripheral or in the VAL: your detectives adapt to the mode of transport chosen by the person.
Shootings
Photos and videos are taken only from the public space and respect intimate life; clichés unrelated to the lens are ruled out.
Witnesses
National network
If the person takes the A1 to Paris or goes to another region, another Investipole agency can continue the mission in France.
discreet surveillance in the Lille metropolis
Tailings at Lille: metro, tram and Belgian border
Lille forms an almost continuous urban fabric with Roubaix, Tourcoing, Villeneuve-d'Ascq and the other municipalities of the European Metropolis of Lille. The Belgian border is about fifteen kilometres away. For a private investigator in Lille, discreet supervision can therefore pass from one municipality to another without changing the decor.
In the centre, between Vieux-Lille, the Grand Place and the shopping streets, walking predominates. Your detectives follow on foot, while a vehicle stands ready on the boulevards at the exit of the area.
Underground, the two lines of the automated metro intersect at Lille-Flandres station. Line 1 connects CHU Eurasanté to the Quatre-Cantons in Villeneuve-d’Ascq; Line 2 runs from Saint-Philibert to CH Dron in Tourcoing, passing through Roubaix. The tramway serves Roubaix and Tourcoing from the Lille stations. Your detectives distribute the likely exit stations before departure.
By road, the ring road provides access to the main routes: the A1 towards Paris, the A25 towards Dunkirk, the A23 towards Valenciennes, the A27 towards Tournai, and the A22 towards Ghent. Your detectives place relays at the interchanges, as Belgium can be reached within a few minutes.
Around the stations, Lille-Flandres serves TER and TGV trains to Paris, while Lille-Europe receives TGVs and international trains, at the foot of the Euralille business district. During peak hours, the crowds often justify assigning two detectives to ensure no one is lost.
The law sets the limit: your detectives never follow a person inside a home or office. Therefore, predetermined meeting points are established in advance, such as metro stations, parking exits, and motorway ramps. Your hours are thus dedicated to the moments that matter.

A word from the Manager
"Diriger Investipole in Lille for almost 20 years has been doing this job with an intact passion and constant demand. The metropolis imposes a true reading of the terrain: discreet supervision can start in Lille-Flandres, continue to Euralille, switch to the Old Lille or borrow the A1. In each case, our role remains the same: to verify the facts accurately, preserve the confidentiality of the client and provide a useful report to both lawyers and competent courts."
David LIOBARD, Managing Director
Nord · Pas-de-Calais
Lille detectives, from the city
to the mining area
From Boulevard de Belfort, your detectives operate in the city, in Roubaix, in Tourcoing and across the entire metropolitan area, then towards Lens, Arras and Valenciennes. The arrangement takes into account motorway connections, the metro, the tram and rapid routes between the municipalities of the metropolitan area.
- Lille
- Romania
- Tourcoing
- Lens
- Arras
- Valencians
FAQ
Lille private detective: answers to your questions
Direct answers to the most frequent questions.
What fees should you expect for a private investigation in Lille?
The rate for a private detective in Lille ranges from €90 to €120 per hour excluding VAT, depending on several criteria, with a free quote offered. Mission duration, night or Sunday interventions, personnel involved, and travel: these four factors influence the total cost. The budget is agreed upon with you in writing before commencement.
Is it allowed to follow someone to Lille?
Yes, if a legitimate interest justifies it and surveillance remains proportionate. Your detectives work from the public highway and places accessible to all, never from a private space. Seized of a dispute, the judge checks that privacy has not been reached beyond what is necessary.
How to follow someone in the Lille metro?
A discreet surveillance in the Lille metro station is being prepared station by station. Your detectives distribute trains and exits, especially in Lille-Flandres where both lines cross, and keep a vehicle on the surface to resume follow-up.
Which cities around Lille do you cover?
The city and the whole of the metropolis, including Roubaix, Tourcoing, Villeneuve-d-Ascq, Lomme and Hellemmes. Your detectives also intervene in Lens, Arras, Valenciennes and throughout the North and Pas-de-Calais.
Tail someone to Belgium from Lille: is it possible?
Your detectives can follow a person to the border and beyond the metropolis, according to the written agreement. On Belgian territory, Belgian law applies: the mission is therefore prepared accordingly with your lawyer.
Monitoring an employee in Lille: under what conditions?
Only on the basis of legitimate ground and serious suspicions: competition during contract, theft, misappropriation or hidden work. Supervision must be necessary, proportionate and limited to professional facts.
How can I contact your detectives in Lille?
The simplest: dial 03 74 09 02 33. You can also write to contact@investipole.fr or go through the contact form of the site. The study of your request and the quotation do not cost anything, and a response usually comes within 24 hours.
Making contact
A situation to clarify in Lille?
Describe it with confidence.
Tell us what is happening, where, at what times, and what you are looking for to demonstrate. The legality of the mission is checked, then a written agreement accompanied by a free quotation is sent to you by your detective agency in Lille.
Investipole Detective Private Lille
3 boulevard de Belfort · 59000 Lille+33 3 74 09 02 33 · contact@investipole.fr · open 7 days a week (6 am – 9 pm)

