Cheating Spouse Private Investigator in Ontario

A cheating spouse private investigator in Ontario is a PSISA-licensed professional retained to lawfully surveil and document a suspected affair. Under Ontario’s Private Security and Investigative Services Act, 2005, only investigators holding a valid provincial licence may conduct this work for a fee, and violating that requirement is itself an offence.

Section 6 of the PSISA prohibits acting as an unlicensed investigator, and Section 45(1) makes a violation an offence carrying a fine of up to $25,000 and/or up to one year’s imprisonment for an individual, or up to $250,000 for a corporation, on conviction. This guide covers what a licensed cheating-spouse investigation includes, the statutes and case law that govern surveillance and recording, how an investigation unfolds step by step, and how the resulting evidence is used, and is not used, in Ontario family court.

What is a Cheating-Spouse Investigation in Ontario?

A cheating-spouse investigation — sometimes called a matrimonial or infidelity investigation — is a licensed investigative service in which a PSISA-licensed private investigator conducts lawful, non-intrusive surveillance and documents observable facts, such as a subject’s whereabouts, associations, and patterns of behaviour, to help a client confirm or rule out suspected infidelity.

It is distinct from unlicensed “DIY” surveillance and from any interception of private communications the investigator is not a party to; both fall outside the scope of a licensed engagement.

Discreet Investigations scopes a cheating-spouse investigation around the client’s specific concern: surveillance during a subject’s stated whereabouts, verification of a claimed alibi, or documentation of a suspected secondary relationship, always within the boundaries of lawful, non-intrusive observation.

Already Weighing the Signs? Confirm Them Before You Investigate

Suspicion alone is rarely enough to justify retaining an investigator. If behavioural, digital, or emotional signs already have you concerned and you want to understand what they mean before commissioning surveillance, a companion guide to signs of a cheating partner walks through that pattern-recognition step; this guide picks up from there, once you are ready to investigate.

It also helps to know how common infidelity actually is. The most widely cited longitudinal dataset, the U.S. General Social Survey analyzed by the Institute for Family Studies, puts lifetime infidelity at 20% for ever-married men and 13% for ever-married women, figures that have held roughly steady since the 1990s; no equivalent Canadian national longitudinal study exists. See the full breakdown of infidelity trends, 1990–2025 for the generational data.

That overall gap nearly disappears among the youngest adults: 18-to-29-year-olds report 10% (men) versus 11% (women), per the same IFS analysis of General Social Survey data. The infidelity statistics: who cheats more, men or women breakdown covers the full age-cohort data.

What Law Governs Private Investigators and Surveillance in Ontario?

Three primary sources define the legal boundaries of a cheating-spouse investigation in Ontario: who may conduct it, what they may record, and how intrusive their methods may be.

• Licensing. Ontario’s Private Security and Investigative Services Act, 2005 requires anyone who investigates the affairs of another person for a fee, including matrimonial surveillance, to hold a private investigator licence issued through the Ministry of the Solicitor General. Section 6 prohibits unlicensed investigative work, and Section 45(1) makes a violation an offence punishable by a fine of up to $25,000 and/or up to one year’s imprisonment for an individual, or up to $250,000 for a corporation.
• Recording consent. Section 184(1) of the Criminal Code makes it an offence to knowingly intercept a private communication. Section 184(2)(a) creates a narrow exception for a person who has the consent, express or implied, of the originator or intended recipient, meaning a spouse may lawfully record a conversation they are personally a party to, but recording a conversation between the other spouse and a third party, where neither has consented, falls outside that exception.
• Reasonableness of covert surveillance. The Office of the Privacy Commissioner of Canada’s guidance on covert video surveillance sets a four-part test for any organization considering covert monitoring: a demonstrable evidentiary need rather than mere suspicion, a clear likelihood the surveillance will achieve its purpose, proportionality between the intrusion and the expected benefit, and confirmation that less-invasive alternatives have been exhausted first.

Each source addresses a different layer of the same question, and a licensed investigator’s methods are built to satisfy all three at once.

How a Cheating-Spouse Investigation Unfolds, Step by Step

Discreet Investigations runs a cheating-spouse investigation through a consistent sequence, regardless of case specifics:

1. Intake consultation. The engagement begins with a discussion of the client’s specific concern, objective, and relevant background, such as schedule patterns or known associations, which the investigator uses to scope the case.
2. Surveillance plan. The investigator builds a plan around the subject’s known routine, prioritizing lawful, publicly observable settings and realistic windows of activity.
3. Licensed field surveillance. Surveillance is conducted in person, limited to public or otherwise lawfully observable settings, with observations logged contemporaneously.
4. Written report. Findings are compiled into a dated, written report of observed facts, formatted for the client and, where relevant, their family law counsel to review.

Every step is governed by O. Reg. 363/07, the Code of Conduct made under the PSISA, which requires every licensed investigator to act with honesty and integrity, comply with all federal, provincial, and municipal laws, treat all persons equally without discrimination, and treat information gathered during an investigation as confidential except where disclosure is required by law or by the terms of the engagement.

What a Licensed Investigator Can and Cannot Legally Do

Three Criminal Code provisions mark the outer limits of what any investigator, licensed or not, may lawfully do while conducting surveillance:

Is Surveillance Evidence Admissible in Ontario Family Court?

Ontario family courts do not automatically admit, or give significant weight to, surveillance evidence, even where it was lawfully obtained. In Sordi v. Sordi, 2011 ONCA 665, the Ontario Court of Appeal, per Epstein J.A., upheld a trial judge’s discretion to exclude a party’s secretly recorded conversations, reasoning that surreptitious recordings generally carry little probative value and can undermine the trust-rebuilding work family courts try to encourage between parents. Sordi stands for the proposition that Ontario family courts retain broad, case-by-case discretion to exclude surreptitious recordings or give them little weight, meaning surveillance evidence, even where lawfully obtained, is not automatically admitted or given significant weight.

Where surveillance evidence is offered, Sections 31.1 through 31.3 of the Canada Evidence Act govern how electronic records, including digital surveillance photos, video, or GPS logs, must be authenticated. The party introducing the record must prove its authenticity and satisfy the best-evidence rule by showing the integrity of the system that created or stored it, for example that the recording system functioned properly or that a neutral third party, such as a licensed investigator, created the record in the ordinary course of business.

Procedurally, how that evidence is filed and disclosed is governed by Ontario’s Family Law Rules, O. Reg. 114/99, a distinct framework from the civil Rules of Civil Procedure. A report intended for family court use should be prepared with these disclosure rules, and family law counsel’s guidance, in mind.

How Infidelity Evidence Is Used in Divorce, Support, and Custody Proceedings

Canada’s Divorce Act is a no-fault statute. Under Section 16, a court’s parenting-order analysis turns on the child’s best interests, meaning physical, emotional, and psychological safety, security, and well-being, and Section 16(5) expressly bars a court from considering a party’s past conduct, including infidelity, unless that conduct is relevant to their ability to parent. In practice, that framing shapes what infidelity evidence can and cannot accomplish:

• Property division. An affair standing alone does not change how family property is divided; Ontario’s equalization regime is not fault-based.
• Spousal or child support. Infidelity by itself rarely affects a support outcome; support turns on income, need, and the length of the relationship, not on marital conduct.
• Parenting and custody. Infidelity becomes relevant only where the underlying conduct, not the affair itself, bears on parenting capacity, such as exposing a child to instability, or where facts uncovered during an investigation are independently relevant to financial disclosure.

What This Means for You

As licensed PSISA investigators, our advice to clients considering a cheating-spouse investigation is straightforward: retain a licensed investigator rather than attempting to record or track a spouse yourself, keep any inquiry focused on lawfully observable facts, and loop in family law counsel early if the findings may be used in a support or parenting proceeding. How evidence is gathered often matters as much to a family court as what it shows.

For more on the investigator behind Discreet Investigations, see James Glanville’s background and credentials. To discuss whether a cheating-spouse investigation fits your situation, call +1 (888) 680-0036 or visit the cheating-spouse investigation service page.

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