Online Defamation in Canada: Hyperlinks, Platforms and Criminal Libel

Canada has no CDA section 230 style immunity for online platforms. Hyperlinking to defamatory content is not by itself publication under Crookes v. Newton, 2011 SCC 47, but posting, sharing or endorsing defamatory material online is analyzed the same way as any other publication.

Jurisdiction scope: This article addresses online publication, platform liability and criminal defamatory libel under federal Canadian law and, for the notice and limitation question, Ontario's Libel and Slander Act specifically. It does not address Quebec's civil law regime, covered separately, and does not predict how a court would rule on a specific online post.

Crookes v. Newton: Hyperlinks Are Not Automatically Publication

In Crookes v. Newton, the plaintiff sued over hyperlinks a blogger had posted, pointing to allegedly defamatory material hosted elsewhere. The Supreme Court of Canada dismissed the appeal, unanimous in result but split in reasoning. The six judge majority, written by Abella J., held that "a hyperlink, by itself, should never be seen as 'publication' of the content to which it refers" (para. 14), reasoning a hyperlink is, in essence, a reference, content neutral, with no control exercised over the linked material. The majority explicitly left open, at paragraph 40, that liability can still attach "if the manner in which they have referred to content conveys defamatory meaning," meaning where the hyperlinker's own surrounding text repeats or adopts the defamatory content. McLachlin C.J. and Fish J., concurring, proposed a more explicit test at paragraph 50: a hyperlink constitutes publication where, read contextually, the linking text "constitutes adoption or endorsement of the specific content it links to." They also flagged, at paragraph 52, that whether an automatically displayed or framed hyperlink would be treated differently was expressly left undecided. Deschamps J., concurring in the result only, would have held that a reference satisfies publication if it makes defamatory content "readily available" through a deliberate act, considering factors such as whether the link was user activated or automatic, shallow or deep, and publicly or restrictively accessible. On the facts, neither the shallow link to a homepage nor the deep link to a specific article amounted to publication; the blogger's own surrounding text had neither adopted nor repeated the defamatory content, and there was insufficient evidence anyone had actually clicked through and read it, even under Deschamps J.'s more permissive approach.

Because the case split three ways in reasoning, it is not accurate to describe Crookes v. Newton as establishing one bright line rule about hyperlinks. The safest general statement, consistent with all three sets of reasons, is that a bare hyperlink is not itself publication, but text that repeats, endorses or adopts the linked content can be.

No Section 230 in Canada: How Platform Liability Actually Works

The judgment in Crookes v. Newton addresses this point directly. Deschamps J. noted, at paragraph 103, that the United States' Communications Decency Act, 47 U.S.C. section 230, "has no Canadian equivalent." Instead, the majority reasons point to the common law innocent dissemination defence as Canada's functional answer, available to "subordinate distributors," such as news agents, booksellers, libraries, and by extension internet service providers and platforms, who had no actual knowledge of the alleged libel, were aware of no circumstances putting them on notice, and were not negligent in failing to discover it (citing SOCAN v. Canadian Assn. of Internet Providers, 2004 SCC 45, at para. 89). A related concept from English case law, the "passive instrumental role" idea from Bunt v. Tilley, holds that a platform is not a publisher merely for playing a passive, facilitative role; it must be knowingly involved in the process of publication. Put together, a Canadian platform or intermediary defending a defamation claim over user generated content is not protected by a blanket statutory immunity the way a US platform would be under section 230. It is protected, if at all, by showing it meets the innocent dissemination test on the specific facts.

Criminal Code Defamatory Libel: Sections 298 to 301

Canada retains a rarely used criminal offence of defamatory libel. Section 298 defines defamatory libel as matter published, without lawful justification or excuse, likely to injure someone's reputation by exposing them to hatred, contempt or ridicule, or designed to insult them. Section 300 makes it an indictable offence, punishable by up to 5 years, to publish a defamatory libel known to be false. Section 301 makes it an offence, without that knowledge of falsity element, to publish a defamatory libel at all, punishable by up to 2 years.

In R. v. Lucas, picketers had accused a Saskatoon police officer of complicity in child sexual abuse and were convicted at trial under both sections 300 and 301. The Supreme Court of Canada held that sections 298, 299 and 300 infringe freedom of expression but are saved under section 1 of the Charter, subject to reading "designed to insult" in section 298 narrowly, requiring a grave insult, and severing the phrase "by the person whom it defames or" from section 299(c) as overbroad. The Court confirmed section 300 requires subjective knowledge of falsity plus intent to defame. Section 301 was different. At the trial level, in a 1995 voir dire ruling, the presiding judge found section 301 unconstitutional because it dispenses with the knowledge of falsity element that saved section 300, "and no appeal has been taken from this finding" (R. v. Lucas, [1998] 1 SCR 439 at para. 17). The Supreme Court in Lucas never actually ruled on section 301 itself. That trial level finding binds only that case and that jurisdiction, not the country as a whole.

The practical, jurisdictionally precise result: section 301 remains formally on the books nationwide, confirmed live in the current Criminal Code text, and a Crown prosecutor outside Saskatchewan is not legally barred from charging under it, even though a Saskatchewan trial court found it unconstitutional in the specific case that became Lucas. Secondary sources identify a further case, reportedly a 2008 Newfoundland Supreme Court trial division decision, as striking down section 301 in that province, and a broader claim that section 301 has been struck down by courts in five provinces. Neither claim was independently verified against primary judgment text for this article, and neither should be quoted or relied on as settled law without that verification. It is not accurate to describe section 301 as "struck down in Canada" generally; at most, the verified record shows one unappealed trial level finding, in one province, that has never been elevated to a binding nationwide ruling.

Does Ontario's Notice and Limitation Trap Apply to Online Publications?

Secondary legal commentary, not independently verified against primary judgment text for this article, reports that the Ontario Court of Appeal has, on balance, extended the notice and limitation regime to an online news article that functions like a newspaper’s own website, citing a 2017 decision said to have endorsed an earlier 2002 ruling to that effect. A separate 2003 decision reportedly sent the same underlying question to trial rather than deciding it categorically, and a 2025 decision reportedly declined to extend the regime to an undefined online platform for lack of evidence about how it functions. None of these case names, dates, or quoted phrases should be treated as confirmed without opening the judgments directly.

Multiple Publication, Not Single Publication

Secondary sources indicate Canadian appellate courts have rejected the American single publication rule in favour of a multiple publication approach, under which each new access to defamatory online content can restart the limitation clock, while also limiting that principle so that mere continued availability of an old post does not create endless new causes of action. Those specific case names and holdings were not independently verified against primary judgment text for this article and should be treated as a general description of the state of the law rather than a citable holding.

Watch out: Sharing a post or adding your own commentary when you link to something can turn a link that would not, by itself, be publication into one that is, if your own words repeat or endorse the defamatory content (Crookes v. Newton, 2011 SCC 47 at paras. 40-42).

This article provides general legal information about online defamation and criminal defamatory libel under federal Canadian law, current as of August 14, 2026. It does not address Quebec's civil law regime and does not assess whether any specific online post would result in liability. For advice about a specific situation, consult a lawyer licensed in the relevant province.

Related reading: the Canada defamation law hub, defamation defences in Canada for the full innocent dissemination and privilege picture, anti-SLAPP laws in Canada, and what to do if you've been defamed or accused.

Frequently Asked Questions

Is sharing a defamatory link the same as publishing it in Canada?

Not automatically. A bare hyperlink is not itself publication under Crookes v. Newton, 2011 SCC 47, but if your own surrounding text repeats or adopts the defamatory content, that can amount to publication.

Can I be sued for defamation for reposting something on social media?

Potentially, yes. Reposting or resharing defamatory content with commentary that repeats or endorses it is treated as ordinary publication under Canadian defamation law, since Canada has no blanket platform immunity like the US section 230.

Are online platforms protected from defamation lawsuits in Canada?

Not by statute. Canada has no equivalent to the US Communications Decency Act, section 230. A platform's protection depends on meeting the common law innocent dissemination test, showing no actual knowledge of the libel, no notice of circumstances that should have alerted it, and no negligence in failing to discover it.

Is criminal defamation still prosecuted in Canada?

Rarely. Criminal Code ss.298 to 301 remain on the books. Section 300, publishing a defamatory libel known to be false, was upheld by the Supreme Court of Canada in R. v. Lucas. Section 301 was found unconstitutional at the trial level in one Saskatchewan case, unappealed, but remains formally in force nationwide.

Does Ontario's newspaper notice rule apply to a blog or social media post?

It depends on the evidence. Ontario Court of Appeal decisions have extended the notice and limitation regime to an online publication that functions like a newspaper, including a newspaper's own website, but have declined to extend it to an undefined social media post without evidence about how the platform functions.

What is innocent dissemination?

A common law defence protecting a subordinate distributor, such as a bookseller, library or online platform, that had no actual knowledge of the alleged libel, no notice of circumstances that should have alerted it, and was not negligent in failing to discover it.