Negligence law compensates more than physical injuries. Two Supreme Court of Canada decisions set the rules for mental injury claims: Mustapha v. Culligan of Canada Ltd., 2008 SCC 27, and Saadati v. Moorhead, 2017 SCC 28.

While replacing a bottle of drinking water at home, Mr. Mustapha saw a dead fly and part of another in it. He developed a serious psychological illness. The Supreme Court held that his injury was real, but that it was not reasonably foreseeable that a person of ordinary fortitude would suffer serious injury from seeing flies in water. His claim failed because the harm was too remote.

Mr. Saadati was in a car crash. Friends and family testified that his personality changed afterwards, but there was no expert diagnosis of a psychiatric illness. The Supreme Court held that a plaintiff doesn't need to prove a recognized psychiatric illness to recover for mental injury. What matters is whether the injury is serious and prolonged and rises above ordinary emotional upset.
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This article is general information for people in Ontario, not legal advice. Rules, forms and deadlines change, and every situation is different. Check the current rule or speak to a licensed legal professional before you act.
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