Here’s the straight goods.

When I was a practicing personal-injury lawyer, I sometimes had to tell hard truths to people who’d signed “ironclad” waivers. Some files still stick out.

One client torched her legs and torso after an obstacle-course jump over a fire pit.

Another signed a golf-club membership waiver, then went down hard on the property.

A high school soccer player tripped in a divot, breaking his ankle.

All had signed a waiver.

In all cases, my job was to separate what felt fair from what Ontario law would actually allow. Waivers can work—and often do—but they’re not bulletproof. The fight is in the details. What the clause says, how it was presented, and whether public-policy limits kick in.

Ontario’s starting point is simple and old-school. Occupiers owe a duty to take reasonable care to keep visitors reasonably safe^[1]. But that duty can be restricted, modified, or excluded by contract or clear notice—i.e., a waiver—so long as the occupier takes reasonable steps to bring the limitation to your attention before the injury^[2].

In practice, that means prominent language (“READ CAREFULLY”), clear reference to negligence, signatures/initials beside the clause, and a process that proves informed assent^[3].

Courts in this province have laid out the roadmap. In Isildar v. Kanata Diving Supply, 2008 CanLII 29598 (ON SC)^[4], the court distilled a three-part analysis: (1) Did the plaintiff know (or should they reasonably have known) they were agreeing to the waiver? (2) Does the wording, properly interpreted, cover the negligence alleged? (3) Even if so, should the waiver be set aside for unconscionability or overriding public policy?

On the strength side of the ledger, recent cases show courts enforcing well-drafted, well-presented waivers—sometimes on summary judgment. In Levita v. Crew, 2015 ONSC 5316 ^[5], a recreational hockey league’s registration waiver barred the negligence claim. The language was clear, the process obvious, and the adult plaintiff understood what he was signing. In Arksey v. Sky Zone Toronto, 2021 ONSC 4594^[6], an electronic click-through waiver—with explicit “negligence” language and an assent flow the operator could prove—knocked out a trampoline-park claim.

The Court of Appeal has also cleaned up a once-messy intersection with consumer law. In Schnarr v. Blue Mountain Resorts Limited, 2018 ONCA 313^[7], the court held that the Occupiers’ Liability Act^[8]is a complete code for occupiers’ duties and allows contractual exclusion of liability for negligence. The Consumer Protection Act^[9] can’t be used to unwind a clear, properly presented ski-hill waiver.

But “ironclad” isn’t magic. Two classic lines of attack regularly succeed:

Notice & presentation defects.

Ontario has long required special attention to onerous fine-print. If the business knows (or should know) you’re signing without appreciating a harsh term, it must bring it to your attention or risk losing the clause. That’s Tilden Rent-A-Car Co. v. Clendenning, 1978 CanLII 1446 (ON CA)^[10], and it still bites. Courts apply that logic to waivers. Buried terms, microscopic print, or back-page clauses with no highlighting can fail. Conversely, bold, plain-language, initial-beside-the-clause waivers tend to stand (Zaky v. 2285771 Ontario Inc., 2020 ONSC 4380^[11]).

Scope & drafting precision.

A waiver must actually cover the risk and the claim. Ambiguity goes against the drafter (contra proferentem). If your injury flows from a hazard or conduct not plainly captured—think post-incident missteps by staff, or a risk materially different from what the form describes—courts can refuse to stretch the wording, as in Isildar and Arksey.

Context matters. In Trimmeliti v. Blue Mountain Resorts Limited, 2015 ONSC 2301^[12], a ski-hill waiver survived because “negligence” was expressly released, the presentation was adequate, and the risks were inherent in the recreational activity. In Bernier v. Ottawa (Ville), 2024 ONSC 6725^[13], the court dismissed a cycling Gran Fondo claim against the municipality and organizers based on a clear, pre-distributed waiver that specifically captured negligence, terrain hazards, and municipal entities—textbook drafting and notice.

There are limits. Even adults don’t contract away everything. Courts remain alert to unconscionability (inequality of bargaining power + an improvident bargain) and public policy. The Supreme Court’s Crocker v. Sundance Northwest Resorts Ltd., [1988] 1 SCR 1186^[14] is the cautionary tale. An inebriated competitor in a tubing event “signed” a form but the resort pushed ahead anyway. The waiver failed on basic fairness and policy. And in Dyck v. Manitoba Snowmobile Assn., [1985] 1 SCR 589^[15], the Court weighed how releases operate in volunteer-sport settings—reminding everyone that context and clarity control. Ontario courts read our waiver cases through that Supreme Court lens.

A word about minors. Ontario courts have not definitively upheld a parent’s pre-injury waiver on a child’s behalf; the weight of commentary (and British Columbia’s Wong (Litigation Guardian of) v. Lok’s Martial Arts Centre Inc., 2009 BCSC 1385^[16], decided under the B.C. Infants Act) leans against enforceability. In Ontario, expect close scrutiny and no guarantees for defendants on a parental release. Don’t bank on it as a silver bullet.

How I counselled clients who had signed:

For the client that fell into the obstacle-course fire pit, the waiver squarely released negligence, warned of inherent risks like heat/flames/terrain, and the operator could prove conspicuous presentation and assent, so prospects were poor. We settled for an amount that while not quite nominal, but reflected the strength of the ironclad waiver. The only real lanes were (a) a notice failure (Tilden/Isildar), (b) showing the injury flowed from risks outside the waiver’s wording (scope), or (c) post-incident conduct so reckless it fell beyond what any waiver contemplates (Isildar; Tilden Rent-A-Car), none of which really applied.

Respecting the golf-club membership fall, membership waivers are classic occupiers’ liability territory. If the club’s documentation/posting clearly excluded the s. 3 duty and the member’s signature acknowledged it—and the clause used the word negligence—defence prospects improved dramatically. We settled nominally at mediation. But small-print, back-page waivers with no highlighting or signage often can fail under s. 5(3)’s “reasonable steps” rule.

I advised the high school soccer player that tripped in a divot, that even with a parent-signed waiver, a minor’s claim isn’t dead in Ontario. So we attacked notice, scope (does it really cover a divot/maintenance defect), and fairness. Then we’d lock down proof with photos/measurements of the hole, inspection logs, and witnesses. We settled for a number that fairly reflected the value of a broken ankle.

Plaintiff-side takeaways

Adults who sign clear, conspicuous waivers that say “including our negligence” are usually in trouble. The more organized the process (online click-through with checkboxes, initials beside the clause, email copy), the tougher it is to beat (Arksey; Levita).

You still have shots. Attack notice (Tilden/Isildar), scope (does the wording really catch this mechanism of harm?), and fairness (unconscionability or misrepresentation). If staff conduct post-injury crosses the line, argue it’s outside the waiver (Isildar). Consumer-law workarounds are dead ends against occupiers after Schnarr. Don’t waste leverage there.

Defence-side discipline

Draft in plain, prominent language. Use the word “negligence”; tie risks to the actual activity and terrain. Capture related entities (landlords, municipalities, clubs). Make the customer sign/initial right beside the exclusion. Send a pre-event copy, and keep a provable record of assent. That’s how Bernier and Arksey were won, and why Trimmeliti and Levita still hold.

Bottom line

In Ontario, waivers work when they’re clear and fairly presented. That’s how it’s always been, and courts haven’t gone wobbly on freedom of contract. But they’re not invincible. If you signed one and were hurt, your lawyer’s job is to assess notice, wording, and fairness with discipline, not false hope. And if you’re drafting them, do it with care and precision.