Ontario law allows trespass notice to be given orally, in writing, by clearly visible signs, or through the Act’s marking system.
At a glance
- The Act recognizes oral and written notice as well as signs placed at ordinary points of access.
- Notice can prohibit entry, permit only certain activities or prohibit particular activities.
- Security staff should know what notice the property actually uses before enforcing site rules.
What this means in practice
The official rules establish a baseline, but a workable security assignment still needs property-specific decisions. The client and provider should turn general requirements into clear instructions about what is checked, who can authorize exceptions, what must be documented and when another authority takes over.
Questions to confirm
- Where is notice displayed?
- Does the notice apply to the whole property or only part of it?
- Are staff using a consistent explanation of the restriction?
Picture this at your property
A site has one “No Trespassing” sign at a rear fence but several normal entrances. The occupier should review whether notice is clear from ordinary access points rather than relying on a sign most visitors never see.
The value of the example is the decision process: identify what is known, what remains uncertain, who has authority, and what information should be preserved for follow-up.
Practical takeaway
The strongest security process is usually the one that makes responsibilities, observations and escalation clear. That creates a service that can be understood and reviewed without overstating what security can guarantee.
Official sources & verification
1. Trespass to Property Act — Ontario e-Laws
2. Section 8: Legal authorities — Government of Ontario
3. Security guard study guide — Government of Ontario
Last reviewed: 2026-08-08. This resource provides general Ontario information and is not legal advice. Legal authority and obligations depend on the facts, the property, the applicable law and current official guidance. Confirm current requirements with the responsible government authority or qualified legal counsel when a decision has legal consequences.