Hiring a Private Investigator in Prague: Checklist

Most people who pick up the phone to a private investigator have never done it before. The first call usually feels awkward, and that often costs the client time and money: either the brief is too vague to scope, or the wrong information is shared and good leads get missed. This checklist is what we wish every new client had in front of them before they call us, or any other licensed Czech investigator.

1. Define the question you actually want answered

"I want to know what my husband is doing" is a feeling, not a brief. "I want to know whether my husband is meeting a specific person at a specific address during business trips to Brno" is a brief. The more specific the question, the cheaper and faster the answer. Write the one-sentence question down before you call.

2. Gather identifiers for every subject

For each person, company or vehicle the investigation will touch, prepare what you can:

• Individuals: full name, date of birth, last known address, employer, phone numbers, email addresses, social-media profiles, recent photograph.
• Companies: business name, IČO (Czech company ID), registered address, names of statutory representatives, any sister or parent companies you suspect.
• Vehicles: registration plate, make, model, colour, where it is usually parked.

3. Document the timeline

Dates matter more than narrative. Prepare a simple timeline:

• When did the suspicious behaviour begin?
• What specific incidents prompted you to call?
• What dates, times and locations are already known?
• What upcoming dates matter (court hearing, claim deadline, board meeting, custody hearing)?

4. Bring the existing paper trail

Investigators do not start from zero. Whatever you already have shortens the engagement:

• Insurance claim file, medical reports, accident report.
• Employment contract, NDA, non-compete clause.
• Court filings, judgments, decisions of the executor.
• Email or message screenshots (with the original device available if possible, exports get challenged).
• Bank statements, invoices, contracts that triggered the suspicion.

5. Decide who is the client

Czech investigators distinguish between three contracting parties: an individual, a company, and a law firm. Engaging through a law firm extends attorney-client privilege over the investigative product, frequently worth the modest extra cost in litigation-bound matters.

6. Be honest about what is lawful

Czech law does not permit a licensed investigator to:

• Place a GPS tracker on a vehicle that is not yours.
• Hack accounts, intercept calls or read messages without the owner's consent.
• Access bank, medical or telecommunications records.
• Enter an enclosed private property to observe a subject.

If a competitor has promised these things, walk away. The evidence is unusable in court and exposes both client and investigator.

7. Ask the investigator the right questions

• Which Czech business licence (živnostenské oprávnění) authorises this work?
• Are you the person who will run the case, or are you brokering it?
• Is the team in-house or sub-contracted, and how is the chain of custody preserved?
• What is the deliverable: an oral debrief, a written report, court-ready evidence with witness availability?
• How is GDPR addressed, who is controller, who is processor, where is the legitimate-interest assessment?

8. Understand pricing structure

Reputable Prague firms quote in one of three ways: hourly fieldwork rates with a written cap, fixed-fee deliverables for defined products (background check, asset trace, EDD report), or a phased budget with go / no-go decisions between phases. Expect a written engagement letter, an advance, and itemised reporting against the budget.

9. Agree on communications

Decide before fieldwork starts: how often you want updates, on which channel, and who else may receive them. Investigations involving family or workplace are often compromised because an update was forwarded to the wrong person.

10. Set a clear endpoint

An investigation without an endpoint becomes a retainer. Agree what the answer "yes", "no" or "inconclusive" looks like, and what happens then.

Clients who walk into the first meeting with this checklist completed routinely cut their fieldwork hours by a third and double the quality of the deliverable. Exero Group's bilingual intake team will guide you through anything on the list you cannot complete on your own.

Red flags to walk away from

• No trade licence. Czech private investigation work requires a concession (koncese) under Annex 3 of the Trade Licensing Act. Anyone offering services without one is operating illegally, and any evidence they produce will be challenged.
• Cash-only pricing or no written engagement. Reputable agencies issue a written engagement letter, scope of work, and VAT invoice. Cash-only arrangements typically signal an unregistered operator.
• Guaranteed outcomes. No legitimate investigator will guarantee that a spouse is unfaithful, that a debtor has hidden assets, or that surveillance will produce a specific result. Outcomes depend on facts, not promises.
• No GDPR documentation. Ask for the agency's Record of Processing Activities entry covering your matter and the data-processing agreement they will sign. If they cannot produce either within a day, look elsewhere.
• Refusal to coordinate with your lawyer. Investigators who insist on working in isolation, without legal oversight, often produce evidence that cannot be used.

Questions to ask in the first call

1. What is your concession number, and on what date was it issued?
2. Who personally will conduct the work, and what is their background?
3. What is your hourly rate, and what triggers additional charges (night work, second operative, cross-border travel)?
4. How will evidence be delivered, and in what format?
5. Can you provide a redacted reference from a Czech law firm or insurer?
6. What happens to the data once the matter is closed?

A serious investigator will answer all of these without hesitation. Anything less and you are buying risk, not intelligence.

What happens after you sign: the engagement workflow

Most clients underestimate how much of an investigation happens before any operative leaves the office. A professional Prague engagement typically follows a four-phase workflow. Phase one is intake and conflict check: the firm verifies your identity, confirms the lawful purpose, runs an internal conflict-of-interest check against existing clients and subjects, and issues a written engagement letter that defines scope, deliverables, milestones and budget caps. Phase two is desk research and OSINT: open sources, commercial registers, land registry, court dockets, sanctions lists and media archives are mapped before anyone is followed. In a surprising number of cases this phase alone answers the client question and avoids the cost of fieldwork. Phase three is targeted fieldwork: surveillance, on-site verification, or discreet interviews, carried out by trained operatives under documented tasking. Phase four is reporting and handover: a structured written report, supporting exhibits, and a debrief call with your legal counsel where appropriate. Expect weekly status updates in writing, even if there is nothing material to report — silence between phases is itself a red flag.

How to use the final report after delivery

A report only creates value if you know what to do with it. Before you act, read it twice: once for the findings, once for the limitations section. The limitations tell you what the investigator could not confirm, and that boundary often matters more in court or in a board meeting than the headline finding. If the report will be used in Czech civil proceedings, share it with your lawyer before any third party, and preserve the original digital file with its metadata intact — exporting to PDF and re-saving can strip hashes that prove integrity. If the report will support an internal HR or disciplinary decision, run it past your DPO so the lawful basis under GDPR Article 6(1)(f) and any Article 9 special-category considerations are documented in your records of processing. If the report will be the basis for a criminal complaint, do not file it yourself piecemeal; hand the complete file to counsel who can frame it for the Police of the Czech Republic or the relevant prosecutor office.

Finally, agree in advance how long the investigator will retain the working file and underlying evidence. Czech professional practice typically retains case files for the limitation period relevant to the matter, then destroys them under a documented retention schedule. You should receive written confirmation of destruction. This protects both sides: you against later data leaks, and the investigator against open-ended liability for material they no longer need.

Hiring a private investigator in Prague: questions clients ask before signing

How much does a private investigation in Prague actually cost?

Serious Czech investigation work is priced on operative hours, not on flat "case fees". Surveillance is typically billed per operative per day with a defined minimum block (often 8–10 hours), plus travel, equipment and reporting time. OSINT and due diligence are usually scoped as fixed packages tied to specific deliverables (entity report, beneficial-owner mapping, litigation footprint). Anyone quoting a flat "find out everything" fee without a written scope is either underpricing in order to upsell later, or has no intention of producing a defensible file. Expect a written engagement letter, a retainer, and itemised invoicing.

What documents should I bring to the first meeting?

The most useful pre-meeting pack contains: a one-page written brief stating the question you need answered, any prior decisions or court documents, copies of contracts or policies relevant to the matter, identification of the parties involved (full legal names, dates of birth where known, company IDs), and a clear statement of who within your organisation has authority to instruct the investigator. The clearer this pack, the faster the engagement can move from intake to fieldwork without scope creep.

How do I know an investigator is licensed?

In the Czech Republic, "Detektivní činnost" is a regulated trade (vázaná živnost). Ask for the company's IČO (company ID), then verify the active trade entry in the public Živnostenský rejstřík at rzp.cz. Verify that the responsible representative meets the statutory professional qualification. A licensed firm will provide this information without hesitation; an evasive answer is itself the answer.

What does a defensible final report look like?

A defensible Czech investigation report identifies the instructing party, the lawful purpose, the scope and timeframe of the work, the methods used, the sources consulted (with hyperlinks or document references), the findings stated separately from the investigator's interpretation, and an explicit statement of limitations. Photographic or video evidence is delivered with original file hashes and an unedited master copy preserved separately. If a report you receive is missing any of these elements, ask for them in writing before you rely on it.

Need investigative support on a similar matter?

Talk to a senior Exero Group investigator in confidence.

Assign a Case