Infidelity Detection - Professional Detective Services for Marital and Relationship Cases
Uncertainty can be more painful than the truth. When your partner’s behavior changes, distance appears, secrets grow, and your intuition tells you “something isn’t right” – that’s the moment to act.
Ministry register RD-9/2017Court expert — Gdansk, Torun, Elblag and Warsaw5.0 from 55 Google reviewsOperating since 2016
In short
In an infidelity case a detective conducts discreet surveillance, documents the partner's behaviour with dated and located photographs and recordings, carries out environmental interviews and verifies alibis. The result is a report that can be submitted in divorce proceedings. All activities are carried out by licensed detectives under the Polish Detective Services Act.
Detectum Agency specializes in infidelity investigations throughout Poland. We operate discreetly, effectively, and in full compliance with the law and privacy standards. We assist individuals who want reliable evidence of infidelity – photos, recordings, and reports – that can be used in court or in a conversation with a partner.
Professional detective in marital and relationship cases
Many people who have entrusted us with infidelity cases previously felt uneasy but lacked evidence. Here are the most common signs of infidelity we observe in practice:
change in routine - more frequent outings, “business trips,” late returns,
hiding the phone - new passwords, abruptly ending calls,
new appearance - sudden style changes, perfumes, increased self-care,
lack of intimacy - emotional or physical distance,
aggression or excessive control - attempts to deflect attention.
A single sign does not necessarily indicate infidelity, but a combination of several should prompt a conversation or professional investigation.
Methods used by detectives in infidelity cases
Infidelity detection requires discretion, experience, and precision. Each case is different, so our approach is always tailored individually.
Discreet surveillance
Detectives conduct surveillance of a person suspected of infidelity – on foot, in a car, or using optical equipment. We collect data on locations, meetings, and contacts.
Photo and video documentation
We create evidence of infidelity in the form of photographs and recordings confirming the partner’s actual behavior. The materials are dated and can be used in court.
Background and environmental inquiries
We collect information from people around us – discreetly, without revealing the source of the inquiry.
Digital analysis and forensic IT
If necessary, we work with IT experts who help recover data from devices and applications, always within the limits of the law.
Alibi verification
We check whether the partner actually stayed where he declared – using monitoring, GPS or team observation.
All activities are conducted by licensed detectives in accordance with applicable laws.
Evidence is a key element in any infidelity case. At Detectum, we prepare a complete documentation package that can be used in legal proceedings:
photos and video recordings with date, time, and description,
detailed detective report,
documentation confirming legal compliance,
materials in digital or printed form.
Reports are clear, chronological, and factual – and can serve as valid evidence in divorce and financial cases.
Costs and stages of an infidelity investigation
The cost depends on observation time, location, number of detectives, and equipment used. We always present a full cost estimate before starting.
Consultation
Free discussion to understand the situation and possible actions.
Action plan
Selection of methods, schedule, and scope of surveillance.
Execution
Discreet observation and evidence collection.
Final report
Delivery of photos, recordings, and written report.
Legal guidance
Provided as part of combined services – both investigative and legal support.
Transparency and trust – no hidden costs, full confidentiality, and legal compliance.
Sample cases (anonymous)
Case 1 “Business trips that never existed”
A client requested surveillance of her husband, who frequently traveled “for work.” Within three days, it was established that he was meeting another woman. Photos and recordings confirmed the infidelity.
Case 2 “The phone that revealed everything”
Behavioral analysis and observation of a partner provided clear evidence of infidelity. The report was used in divorce proceedings.
Case 3 “A double life”
Detectives determined that the client’s wife had rented a second apartment. The collected evidence confirmed infidelity in court.
Frequently asked questions
Infidelity investigations — questions and answers
What are the signs of infidelity?
The most common signals are a changed routine and frequent business trips, a hidden phone and new passwords, a sudden change of appearance, emotional or physical distance, contradictory explanations and unexplained spending on restaurants, hotels or gifts. A single sign proves nothing — several at once are a reason to check.
Is evidence of infidelity collected by a detective valid in court?
Yes, if it was collected lawfully. Photographs and recordings carry the date and place, and the report is prepared in a form that can be filed in divorce proceedings. Material gathered privately, in breach of the other person's privacy, can turn against the person submitting it.
How long does an infidelity case take?
It depends on the observed person's routine. Some cases close after a few days of surveillance, others require several weeks of work in selected time windows. The scope and expected duration are agreed during the free consultation.
Will my partner find out?
No. Surveillance is conducted discreetly by field detectives and only the client knows about the assignment. Confidentiality is a statutory duty of a Polish detective, not just a promise.
Can a detective access my partner's phone?
No, and we do not do it. Accessing someone else's phone, email or messaging without their consent is a criminal offence in Poland. Digital analysis is performed only on devices and data the client is legally entitled to.
Where we work
Gdynia, Gdansk, Sopot and all of Poland
Our head office is in Gdynia at Podolska 21 and our branch is in
Gdansk at Jana Heweliusza 11, unit 811. Most of our work takes place in
the Tricity area and Pomerania — Gdynia, Gdansk, Sopot, Rumia, Reda, Wejherowo and Tczew.
We also have field units in several regions of the country, and our mobility together
with cooperation with other licensed detectives lets us run cases throughout Poland
and beyond its borders.
Detective licence no. 0002591 issued by the Regional Police Commander in Gdansk. Licensed detective agency entered in the register of the Polish Ministry of the Interior under number RD-9/2017. Court expert in private investigation and investigative techniques at the Regional Courts in Gdansk, Torun, Elblag and Warsaw.
Winner of the Orły Ochrony 2022 award
Free consultation
Free consultation online
You do not have to commit to anything. Describe the situation and we will say plainly whether we can help and what the case will require.
You can also text “contact” to +48 666 607 600 and we will call you back.