Short answer: A surveillance investigation moves through clear stages: an intake conversation to define what you actually need documented, planning that maps out the subject’s likely pattern of life, field observation conducted from lawful vantage points during authorized hours, and a court-ready written report with the footage delivered as organized digital exhibits. Throughout, a licensed investigator documents what genuinely happens. Nothing is staged, provoked, or invented. Results can never be guaranteed, because surveillance records real events, and some authorized hours simply yield nothing. This is a behind-the-glass walkthrough of the process from the perspective of the person hiring, so you know what to expect and what a professional engagement looks like.
What happens first? How does the intake work?
Everything starts with a conversation. Before anyone goes into the field, we need to understand the objective: what you are trying to establish, and why it matters. “Follow my subject” is not an objective. “Document whether the subject is performing physical activity inconsistent with a claimed injury during weekday mornings” is. The sharper the objective, the better the planning, and the more efficient the field work.
During intake we will also confirm the practical facts we need to operate lawfully and effectively: who the subject is, where they can be observed, and the timeframe that matters for your case. This is also where scope and cost are set honestly, so there are no surprises later. From there, the case is assigned and prepared.
One thing to know up front: a licensed investigator will decline work that cannot be done legally. We conduct covert surveillance from public vantage points or from property where we have consent. We do not trespass. The Trespass to Property Act is a firm line, not a suggestion. If achieving your objective would require breaking the law, we will tell you that plainly and, where we can, propose a lawful path to the same information.
How does an investigator decide when and where to conduct surveillance?
Good surveillance is planned, not improvised. Before a single hour is spent in the field, we build an understanding of the subject’s likely pattern of life: the routines, times, and locations where the behaviour you care about is most likely to occur. Watching the wrong place at the wrong time burns hours and money and captures nothing.
That planning draws on open-source research and lawful information-gathering to inform where and when observation is most productive. It is the difference between sitting outside a residence at random and positioning to observe during the window when the relevant activity actually happens. If you want a deeper sense of the analytical side of that groundwork, our overview of open-source intelligence in investigations covers how lawful public information supports field work, and it pairs with our companion piece on PIPEDA and lawful surveillance, which explains the privacy rules that govern how that information is handled.
Planning also determines staffing. Static observation of a single fixed location can often be handled by one investigator. Mobile surveillance, where the subject moves and must be followed, frequently requires two, so that coverage stays continuous and the subject is far less likely to notice. Those are operational decisions made to serve your objective, and they are explained to you as part of the plan.
What can realistically be captured, and what can’t?
This is where honest expectation-setting matters most.
What can be captured: the subject’s observable activity in public or from lawful vantage points, where they go, what they do, who they are with, and when. Modern equipment extends what “observable” means considerably. Purpose-built distance and night-vision surveillance equipment can record fine detail, resolving something as small as a licence plate at 500 metres in darkness, with daytime range extending up to 3 kilometres. That capability lets us document clearly and from a discreet distance, which is both better evidence and better tradecraft.
What cannot be captured, legally or at all: we do not, and will not, record private activity that a person has a reasonable expectation of privacy in, and we do not trespass to get a better angle. On audio, Ontario and the rest of Canada operate under one-party consent (Criminal Code s. 184(2)(a)): a party to a conversation may lawfully record it, but planting a device to intercept a conversation you are not part of is interception under s. 184(1), an offence carrying up to five years. Ethical firms stay well clear of that line, and any operator who offers to plant a bug is offering to commit a crime that will also destroy your case.
And there is a plainer limit: surveillance can only capture what actually happens. If the subject does not do the thing you are trying to document during the hours we are authorized to observe, there is nothing to record. That is not a failure of effort. It is the nature of documenting reality.
How long does surveillance take, and why can’t results be guaranteed?
Surveillance is scheduled in blocks of authorized hours, and how many blocks a case needs depends entirely on the objective. Some cases resolve in a single well-planned session, because the behaviour occurs predictably and we planned for the right window. Others require several days, spread across different times, to capture a behaviour that only happens intermittently or to establish a pattern rather than a one-off.
More hours mean more opportunity to observe, but time does not manufacture events. This is why no ethical investigator guarantees results. We can plan carefully, position well, and use the right equipment to maximize the odds, but at the end of the day, surveillance documents what happens during authorized hours, and some days yield nothing. A firm that promises a guaranteed outcome is either misleading you or planning to fabricate, and fabricated evidence is worse than no evidence at all.
What we do guarantee is professional effort and truthful reporting: you will get an honest account of what was and was not observed, documented to a standard that holds up.
What’s in a court-ready surveillance report?
The report is the deliverable, and a proper one is built to survive a courtroom, not just to inform you casually. Here is what a court-ready surveillance report includes and why each element matters.
- Verified timestamps. Courts rely on timestamps to anchor when events occurred, so our cameras are time-verified before every assignment. An event without a reliable time attached is far weaker evidence.
- Unedited footage. The video is delivered uncut. Editing, even innocent trimming, invites the question of what was removed, so the raw record is preserved.
- Continuity and audit clips. The sequence of events is documented so it can be followed without gaps. Continuity is what lets a reviewer trust that they are seeing the whole picture, not a selected fragment.
- Intact chain of custody. Footage is recorded to designated, labelled agency SD cards and retained under a documented process (typically around seven years). That unbroken path, from lens to exhibit, is what allows the evidence to be authenticated.
- Digital exhibits and a written report. The written report ties observations to dates, times, and locations, and organizes the footage as clearly labelled digital exhibits ready for use.
- A credible investigator who can testify. Behind the report stands a person who conducted the surveillance and can speak to what they observed under oath. That testimony is often the element that carries the evidence.
Put together, these are the same elements that make surveillance evidence admissible, described in plain terms. The report is not just a record for you. It is an instrument built for the process your case may enter.
How is discretion maintained?
Discretion is not a bonus feature of surveillance; it is the entire point. The moment a subject realizes they are being observed, they change their behaviour, and the intelligence value of the operation collapses. So everything is designed to avoid that: lawful vantage points, appropriate distance and equipment, and staffing decisions (such as using two investigators for mobile work) that keep any single presence from becoming familiar.
Because discretion depends on method, this article deliberately stops short of describing the specific techniques we use. There is a real distinction here worth naming. This piece is written for the person hiring an investigator, to demystify the experience. The detailed craft of how surveillance is conducted lives in our practitioner-facing field guides. See the art of surveillance, part one and the art of surveillance, part two, which are written for and about the discipline itself. As a client, what you need to know is that discretion is a professional priority we take seriously, not that you need the operational details of how it is achieved.
What does the whole process look like, start to finish?
To pull it together, here is the arc of a typical engagement from your side of the glass:
- Intake. We define the objective, confirm the practical and legal facts, and set scope and cost honestly.
- Planning. We establish the subject’s likely pattern of life and decide when, where, and with how many investigators to observe.
- Field observation. We conduct lawful, discreet surveillance during authorized hours, documenting what genuinely happens.
- Reporting. We deliver a court-ready written report with verified timestamps, continuity, an intact chain of custody, and unedited footage as organized digital exhibits.
- Testimony, if needed. The investigator who did the work can testify to what they observed.
Throughout, the through-line is the same: lawful, discreet, honest documentation of reality. Not a promised outcome, but a professional, admissible record of what happened.
Frequently asked questions
How does private investigator surveillance actually work?
It runs in stages: an intake conversation to define the objective, planning that establishes the subject’s likely pattern of life, field observation from lawful public or consented vantage points during authorized hours, and a court-ready written report with the footage as digital exhibits. The investigator documents what happens; they do not stage or provoke anything.
How long does a surveillance investigation take?
It varies with the objective. Some cases resolve in a single well-planned session; others need several days spread across different times to capture a recurring behaviour. Surveillance is scheduled in blocks of authorized hours. More hours mean more opportunity to observe, but there is no fixed duration. The case is planned to the objective, and results are documented as they occur.
Can you guarantee you’ll capture what I’m looking for?
No. Surveillance documents what actually happens during authorized hours. Some days the subject does exactly what was anticipated; some days they stay inside and there is nothing to record. An honest investigator plans well to maximize the odds and reports truthfully on the outcome, but no ethical firm guarantees a result.
What is included in a surveillance report?
A professional surveillance report ties observations to verified dates and times and presents the footage as organized digital exhibits. The footage is delivered unedited and accurately timestamped, with an intact chain of custody. Continuity is documented so the sequence of events can be followed, and the investigator who conducted the surveillance can testify to what they observed.
Will the subject know they are being watched?
Discretion is central to the work. Surveillance is conducted from lawful public vantage points or property where consent exists, using techniques designed to avoid drawing attention. If a subject becomes aware of surveillance, they change their behaviour and the intelligence value drops, so avoiding that is a professional priority, which is also why we do not publish the specific methods used to maintain it.
This article is general information about investigative practice in Ontario, not legal advice. Laws change and every situation is different. For advice about your specific circumstances, consult a licensed Ontario lawyer or contact a licensed investigator directly.