Canada Defamation Time Limits: Notice Deadlines and Limitation Periods by Province

A defamation claim in Canada can be lost on a deadline long before anyone argues about what was actually said. Every common-law province except British Columbia and New Brunswick requires a plaintiff to give a newspaper or broadcast defendant written notice on a short statutory clock: six weeks in Ontario, three months in Alberta, Manitoba, Nova Scotia, Prince Edward Island, and Newfoundland and Labrador, and, in Saskatchewan since October 1, 2026, 14 days before any defamation action. Several of those provinces then run a separate media-specific limitation period alongside the notice rule, ranging from three months in Ontario to six months in Nova Scotia and PEI and four months in Newfoundland and Labrador. Missing either one can end a claim regardless of its merits. This article sets out those deadlines province by province, plus the ordinary limitation periods that apply to non-media defendants. It is general information, not legal advice, and it is not a substitute for confirming current deadlines with a lawyer before a claim is filed.

This article states each province's rules as described in its own current legislation. Defamation deadlines are unforgiving and fact-specific, and this is general information only. Confirm current deadlines with a lawyer licensed in the relevant province before relying on anything below to decide when to act.

Two Separate Layers of Deadline

Every common-law province's Libel and Slander Act or Defamation Act carries a notice-and-shortened-limitation block that applies only to newspaper and broadcast defendants. That block sits on top of, and is separate from, each province's general Limitations Act, which sets the ordinary period for a defamation claim against anyone else, or against a media defendant once the media-specific notice condition has been satisfied. A reader needs to check both layers, not just one, before assuming they know their deadline.

Notice and Shortened-Limitation Traps, Province by Province

Ontario: the six-week trap

Ontario's Libel and Slander Act requires written notice within six weeks after the libel came to the plaintiff's knowledge, not the publication date, specifying the matter complained of. The lawsuit itself must then be commenced within three months of that same knowledge date. Both requirements apply only to a newspaper printed or published in Ontario, or a broadcast from an Ontario station, a territorial test rather than a test of who counts as a journalist. A retraction that meets the Act's conditions limits the newspaper or broadcaster to actual damages only, and the proprietor or publisher must state their name and publication address at the head of editorials or on the front page to get the benefit of these provisions at all.

British Columbia: no notice regime at all

British Columbia is a genuine, practically important exception. Its Libel and Slander Act contains no six-week or pre-action notice requirement of any kind, and no shortened limitation period comparable to Ontario's three months. The only timing rule in the Act is a "one clear day" that must pass between the cause of action arising and filing, a trivial procedural formality rather than a knowledge-triggered deadline. A British Columbia defamation action, against a media defendant or anyone else, runs on the province's general two-year discoverability Limitation Act.

Alberta: notice without a separate limitation

Alberta requires notice within three months of the plaintiff's knowledge, seven days for a daily newspaper or fourteen days for any other newspaper or broadcast. Unlike Ontario, Alberta's Act has no separate shortened court-filing limitation section; once notice is served, an Alberta defamation claim runs on the province's general two-year discoverability limitation period.

Saskatchewan: a new Defamation Act since October 1, 2026

Saskatchewan replaced its defamation statute outright on October 1, 2026. The Defamation Act, SS 2026, c 15, assented to on May 14, 2026 and brought into force on October 1, 2026, repeals The Libel and Slander Act, RSS 1978, c L-14 (s 17) and drops the libel and slander distinction in favour of a single tort of defamation that expressly covers words published in any electronic medium (s 2).

The notice rule is no longer a newspaper rule. Section 3(1) requires any person claiming that a publication is defamatory to give 14 days' written notice to the publisher of an intention to bring an action. The notice must describe the words complained of and be in the form, and served in the manner, set by regulation (ss 3(2) and 3(3)). Failing to give it is not a bar to the action: section 3(4) says the failure must be taken into account when the court assesses damages and costs.

Two timing provisions sit alongside it. Section 3(5) extends the limitation period by 15 days where the two-year period under section 5 of The Limitations Act would otherwise expire during the notice period, before the action could be commenced. Section 8 adds a single publication rule: for limitation purposes, a claim over a subsequent publication of substantially the same words is treated as having been discovered when the first publication was discovered (s 8(3)), unless the manner of the later publication is materially different (ss 8(4) and 8(5)). Saskatchewan still has no separate shortened limitation period for media defendants.

Manitoba: full coverage, single notice deadline

Manitoba's Defamation Act defines both "newspaper" and "broadcasting," giving it fuller coverage than Saskatchewan. Notice is required within three months of knowledge, seven days for a daily paper or fourteen days for any other newspaper or broadcast, and it applies to the proprietor, publisher, owner-operator, or any officer, servant or employee. Manitoba has no separate shortened limitation section; once notice is served, a claim runs on Manitoba's general Limitations Act, a two-year basic period with a fifteen-year ultimate limitation, in force since May 30, 2023.

Nova Scotia: notice plus a genuine separate limitation

Nova Scotia stacks two independent deadlines on a media defendant. Section 18 requires notice within three months of knowledge, seven or fourteen days depending on frequency. Separately, section 19 states, "notwithstanding the Limitation of Actions Act," that an action against a media defendant must be commenced within six months after the defamation came to the plaintiff's notice or knowledge. This is a real, standalone shortened limitation, not merely a notice precondition, and it applies to the proprietor or publisher, the owner or operator, or any officer, servant or employee.

New Brunswick: the notice regime was repealed

New Brunswick is the one Atlantic province with no notice-and-shortened-limitation trap of any kind. Its current Defamation Act's gating section now only restricts place-of-trial and mitigation-of-damages provisions to media defendants; there is no surviving notice section or shortened limitation section anywhere in the current consolidated text, following a 2009 amendment tied to the province's general limitations reform. A New Brunswick defamation claim, against a media defendant or anyone else, runs on the same two-year discoverability, fifteen-year-ultimate general limitation period under the province's Limitation of Actions Act. A commonly repeated figure of thirty years for New Brunswick's ultimate period does not match the current statutory text, which states fifteen years.

Prince Edward Island: mirrors Nova Scotia

Prince Edward Island's Defamation Act requires notice within three months of knowledge, five days for a daily paper or fourteen days for any other newspaper or broadcast, and separately requires that an action against the proprietor or publisher of a newspaper, or the owner or operator of a broadcasting station, be commenced within six months after the defamation came to the plaintiff's notice or knowledge, the same stacked structure Nova Scotia uses.

Newfoundland and Labrador: the shortest standalone limitation

Newfoundland and Labrador requires notice within three months of knowledge, seven or fourteen days depending on frequency, and separately requires that an action against the proprietor, publisher, owner-operator, or an officer, servant or employee be started within four months after the defamation came to the plaintiff's notice or knowledge. That four-month figure is the shortest standalone shortened limitation among the provinces surveyed here, shorter than Nova Scotia's and Prince Edward Island's six months, though longer than Ontario's three-month figure, which functions somewhat differently since Ontario pairs it with an earlier six-week notice deadline rather than a later-triggered separate limitation.

Ordinary Defamation Limitation Periods, Discovery Versus Accrual

Separate from the media notice traps above, every province has a general limitation period that applies once any notice condition, if one exists, has been satisfied. Seven of the nine common-law provinces run this period from discovery, meaning from when the plaintiff learned, or reasonably should have learned, of the defamatory statement. Prince Edward Island and Newfoundland and Labrador are structural outliers, running their two-year period from accrual, meaning the date of publication itself, which is a materially worse position for a plaintiff who does not learn of a statement right away. Newfoundland and Labrador's Limitations Act goes further, explicitly excluding defamation from the six categories of claim eligible for its own discoverability postponement provision.

Online Publication and the Notice Regime: An Unsettled Question

Whether Ontario's six-week notice and three-month limitation extend to an online-only publication is a genuinely contested question, not a settled one, and the case law summarized here rests on secondary legal commentary rather than judgment text opened directly for this article. The weight of Ontario Court of Appeal authority is reported to extend the notice-and-limitation regime to an online publication that functions like a newspaper, including a newspaper's own website, but courts have declined to extend it to an undefined social-media-style post where no evidence was led about how that platform actually functions. That distinction appears to be evidence-driven case by case, not a categorical rule either way, and it should not be treated as settled law without independent confirmation for a specific situation.

Does Each New View Restart the Clock? The Single-Publication Question

Canadian courts are reported to have rejected the American "single publication" rule, under which a defamation claim's clock runs once from the original publication date. Canadian courts are instead reported to apply something closer to a "multiple publication" approach, under which each fresh access to defamatory content available online can potentially support a new cause of action. This description rests on secondary sources rather than primary judgment text opened directly for this article, and Ontario's own law reform body has reportedly recommended that the province legislatively adopt a single-publication rule, which would change this if enacted. Anyone whose claim turns on exactly when a limitation period started running against content that remained continuously available online should treat this as an open, unsettled area rather than a fixed rule.

Quebec: One Deadline, No Media Carve-Out

None of the notice traps or provincial variation described above applies in Quebec. Quebec runs a single one-year prescription period from the date the plaintiff learned of the defamation, under article 2929 of the Civil Code of Québec, and that period applies identically to every defendant, media or not. See the separate article on Quebec's civil-law regime for the full framework; nothing in the tables above should be applied to a Quebec claim.

Why These Deadlines Matter More Than the Underlying Claim

A defamation claim's substantive strength does not matter if a notice deadline or limitation period has already passed. The variation described above, six weeks in Ontario, no requirement at all in British Columbia or New Brunswick, a stacked three-month-and-six-month structure in Nova Scotia and Prince Edward Island, four months in Newfoundland and Labrador, means the single most important early step in any Canadian defamation situation is identifying which province's rules apply and confirming the current deadline, not assessing the merits of the underlying statement. For the elements a plaintiff otherwise has to show, see the common-law framework article; for what a claim that clears these deadlines might realistically be worth, see the damages article.

For the rest of this series, including defences, anti-SLAPP protections, online defamation, and how to respond, see the Canada defamation law hub.

This article is for general information only and reflects each province's own current legislation as described here. Deadlines change, and this is not a substitute for confirming the current notice and limitation rules with a lawyer licensed in the relevant province before acting on any real timeline.

Frequently Asked Questions

What is Ontario's notice deadline for a defamation claim against a newspaper?

Written notice within six weeks after the libel came to the plaintiff's knowledge, followed by a lawsuit within three months of that same knowledge date. Both apply only to a newspaper printed or published in Ontario, or a broadcast from an Ontario station.

Do all Canadian provinces require notice before suing a newspaper for defamation?

No. British Columbia has no notice requirement at all, and New Brunswick repealed its notice-and-shortened-limitation regime in 2009. Every other common-law province surveyed here requires notice, typically within three months of the plaintiff's knowledge.

How long do I have to sue for defamation if the defendant is not a newspaper or broadcaster?

In most common-law provinces, two years from discovery of the defamatory statement, under each province's general Limitations Act. Prince Edward Island and Newfoundland and Labrador are exceptions, running their two-year period from the date of publication instead of discovery.

What happens if I miss the notice deadline for a defamation claim against a newspaper?

In a province that requires notice, missing the deadline can bar the claim entirely, regardless of how strong it otherwise is. The notice-and-shortened-limitation provisions in these statutes are conditions on bringing the claim, not procedural formalities that can be waived after the fact.

Does posting something online reset how long someone has to sue me for defamation?

This is an unsettled area of Canadian law. Courts are reported to have rejected the strict single-publication rule used in the United States, meaning continued online availability of a statement may support a new cause of action, but the exact boundaries of that rule have not been settled by a case opened and verified for this article. Treat this as an open question, not a fixed rule.