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ARTICLE · 29 OCTOBER 2026

Honest Belief No Defence To Defamatory Tweet About MP (Maggi v. Smith)

Gardiner Roberts LLP
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A recent Ontario court decision examines whether sincere belief in serious allegations can protect speakers from defamation liability when making accusations about public figures on social media. The case arose from posts alleging that a lawyer and Member of Parliament intimidated voters during a political nomination contest, raising important questions about the balance between free expression and reputation protection in political discourse.

CanadaLitigation, Mediation & Arbitration
James R.G. Cook
James R.G. Cook
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The Supreme Court of Canada has stated that “the right to free expression does not confer a licence to ruin reputations”. This principle was illustrated in Maggi v. Smith, 2026 ONSC 6080, a recent decision arising from a heated political controversy on social media. In this decision, the Ontario Divisional Court affirmed that an honest belief in the truth of a serious allegation will not shield a speaker from liability for defamation.

The plaintiff was a lawyer who later became a Member of Parliament. The dispute had its origins in a federal Liberal Party nomination contest held in 2014. Various concerns were raised throughout that contest regarding campaign conduct, voting procedures, membership eligibility and alleged efforts to discourage certain individuals from voting. Some of the concerns were the subject of internal party proceedings and appeals but there were no findings that the plaintiff had personally threatened prospective voters about their immigration or residency

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