Questions to Ask a Private Investigator
Questions for the first conversation with a private investigator, covering licensing, what the work can and cannot legally involve, how time is billed, and how findings would hold up if the matter reaches a court.
The questions
Open any question for the note
Are you licensed where the work would take place, and what's your licence number?
Why ask it
Most jurisdictions license investigators, and the number lets you check the record yourself rather than take a website badge on trust. Work done unlicensed can also make the resulting evidence useless to you.
Do you carry liability insurance, and can you send me the certificate?
Why ask it
If an investigator is accused of trespass or harassment while working for you, the insurance position matters to you as well as to them. A working professional produces the certificate the same day without being pressed.
How many cases like mine have you taken in the last year?
Why ask it
Asks for a number rather than reassurance. Surveillance, missing persons, asset searches, and background checks call for different skills, and "we do all of it" from a one-person firm usually means occasional experience of each.
What can you legally do here that I can't do myself?
Why ask it
A straight answer sets the value of hiring anyone. Watch for the opposite claim, that a licence unlocks private bank, phone, or medical records, which is a description of an offence rather than a service.
What will you refuse to do, even if I ask?
Why ask it
The most important question in this conversation. An investigator with clear limits, on trackers, recordings, pretexting, and entering property, is one whose work will not later be used against you.
Where does your information actually come from?
Why ask it
Legitimate answers involve court and property records, licensed database access, physical observation from public places, and interviews. Vagueness or a hint at a contact inside a bank or a phone company should end the meeting.
If this ends up in court, will your findings be usable, and have you testified before?
Why ask it
Evidence gathered the wrong way can be excluded and can damage your own position. An investigator who has been cross-examined will talk about chain of custody and contemporaneous notes without prompting.
Should I be speaking to a lawyer before you start?
Why ask it
In matters heading for litigation, custody, or an employment dispute, many lawyers prefer to engage the investigator themselves. An investigator who says so, at the cost of a slower start, is giving you honest advice.
What's the retainer, the hourly rate, and what counts as billable?
Why ask it
Travel, waiting, mileage, database fees, and report writing are often billed and often unmentioned. Ask which of them apply, because waiting time alone can dominate the cost of surveillance.
What happens when the retainer runs out?
Why ask it
You want to know whether work stops for a decision or continues on an open invoice. Agreeing an authorization point in advance is what prevents the bill that arrives at three times the estimate.
For what I've described, how many hours would you expect, and what could push it up?
Why ask it
A range with named risks is a sign of experience. A flat promise of a result in a fixed number of hours, before anyone has looked at the situation, is a sales tactic.
What's the most likely reason this ends without an answer?
Why ask it
Every case has a realistic failure mode: the subject stays home, the records are sealed, the trail is fifteen years old. An investigator who cannot name one either has not thought about your case or is not being straight.
How will you report to me, how often, and in what form?
Why ask it
Written reports with dates, times, and photographs are worth far more later than phone updates. Ask to see a redacted sample report so you know what you will be paying for.
Who else would work on this, and are they licensed and insured as well?
Why ask it
Multi-day surveillance usually needs more than one person, and subcontractors are common. You are responsible for who is working on your behalf, so ask for the same checks on them.
What happens if the subject notices you?
Why ask it
Being spotted is a normal event, not a disaster, and the answer tells you whether they will withdraw and reassess or improvise. Improvising is where trespass and confrontation come from.
How do you store my file, and who else can see it?
Why ask it
Case files hold sensitive material about you as well as about the subject. Ask about retention periods and what happens to the file when the matter closes.
Have you ever had a licence complaint or been sued?
Why ask it
Long careers occasionally include both, and a candid explanation is more reassuring than a flat denial. You can usually verify the answer with the licensing body afterwards.
Will you put the scope, the rate, and the reporting schedule in a written agreement?
Why ask it
The engagement letter is your protection on cost and on conduct. Reluctance to write down what was agreed verbally is the clearest warning sign available at this stage.
What do you need from me, and what should I stop doing right now?
Why ask it
Clients routinely damage their own cases by confronting the subject, posting online, or driving past the address. A good investigator gives that instruction early and unprompted.
If you conclude I'm asking for the wrong thing, will you tell me?
Why ask it
Some cases are better handled by a lawyer, a forensic accountant, or the police, and some suspicions are better resolved by a conversation. Someone willing to say so is worth more than someone who takes every case.
Hiring an Investigator Without Creating a Second Problem
Practical guidance for the conversation itself
Checks Worth Doing First
Verify the licence with the regulator, not the website
Most licensing bodies publish a searchable register including the status of the licence and any disciplinary history. This takes a few minutes and is the single most useful thing you can do before the first meeting.
If litigation is possible, involve a lawyer first
Where a case may end in court, lawyers often prefer to instruct the investigator directly so the work sits within their own file. Ask your lawyer how they want it arranged before you sign anything.
Get the scope in writing before any work starts
The agreement should state what will be done, where, by whom, at what rate, with what reporting, and what the authorization limit is. Verbal scope is where cost disputes begin.
Decide in advance what you will do with the answer
Investigators report that clients often do not know what they want the information for. Knowing whether you are heading for a conversation, a lawyer, or a decision keeps the work proportionate and shortens the bill.
Keep your own hands off the case
Do not follow anyone, do not create accounts to watch them, and do not tell people you have hired someone. Client activity is the most common reason a subject becomes cautious and the cost doubles.
Warning Signs
A promise of results
Nobody can guarantee what a subject will do while being watched or what a sealed record contains. A guarantee usually means the finding is being shaped to fit what you have said you expect.
An offer to obtain private records
Bank statements, call logs, and medical files are protected. Someone offering them is describing conduct that is unlawful in most places, and a case built on it can rebound onto you.
Cash only, no paperwork
No written agreement, no invoices, and no licence details means no recourse and, if the matter reaches court, an evidence trail that cannot be explained.
Encouraging you to act on partial findings
Photographs and timelines are open to more than one reading. Pressure to confront someone, move money, or make an accusation on the strength of an early report is a reason to slow down.
Sequences by Situation
First fifteen minutes with any investigator
- 1"Are you licensed here, and what's the number?"
- 2"How many cases like mine in the last year?"
- 3"What will you refuse to do, even if I ask?"
- 4"What's the retainer and what counts as billable?"
If the matter may go to court
- 1"Should I speak to a lawyer before you start?"
- 2"Have you testified before?"
- 3"How do you document what you observe?"
- 4"Will your findings be usable as evidence?"
A family or personal matter
- 1"What's the most likely reason this ends without an answer?"
- 2"What should I stop doing right now?"
- 3"If you think I'm asking for the wrong thing, will you tell me?"