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Edmonton, AB · 2026-09-24

Defamation and Online Reviews in Alberta: When a Post Becomes a Lawsuit

Defamation: illustrated cover for a LawDB guide about Edmonton, Alberta
Reynolds Mirth Richards & Farmer lists defamation and media law among its practice areas. This guide is our own general overview.

A harsh online review or social media post can feel like a legal problem, and sometimes it is. Alberta law protects reputation, but it also protects expression, and a 2019 statute gives courts a quick way to weed out some lawsuits.

What defamation is

Defamation generally requires a statement that identifies the person, is communicated to others and would tend to lower their reputation in the eyes of reasonable people. Written statements, including online posts, are libel.

Common defences include truth, fair comment on a matter of public interest and responsible communication on matters of public interest.

Alberta’s anti-SLAPP law

The Protection of Public Participation Act allows a defendant to ask the court to dismiss, at an early stage, a lawsuit that targets expression on a matter of public interest. The plaintiff then has to show the claim has substantial merit and that harm outweighs the public interest in the expression.

The aim is to protect debate from being chilled by expensive lawsuits.

If you are involved

Save screenshots, dates and links before content is deleted. Consider whether a correction or takedown request solves the problem more cheaply than a lawsuit. Defamation claims generally have a limitation period of two years, so do not delay in getting advice.

If a post is causing you problems

Firm spotlight: Reynolds Mirth Richards & Farmer LLP

Reynolds Mirth Richards & Farmer, known as RMRF, has served clients from Edmonton since 1915. The firm says its lawyers have been appointed to the Supreme Court of Canada, the Court of Appeal of Alberta, the Court of Queen’s Bench, the Provincial Court of Alberta and the Supreme Court of the Northwest Territories. Its office is in the Stantec Tower on 103 Avenue NW. See the full Reynolds Mirth Richards & Farmer LLP profile. Read more from RMRF’s website.

Frequently asked questions

What is defamation?

A false statement communicated to others that harms a person’s reputation.

Is a negative review defamatory?

Not necessarily. Honest opinion and true statements can be protected.

What is Alberta’s anti-SLAPP law?

The Protection of Public Participation Act, which allows early dismissal of some claims that target public interest expression.

How long do I have to sue for defamation?

Generally two years.

Should I save the post?

Yes. Capture screenshots and links with dates before anything is removed.

Alberta firms to look at

Reynolds Mirth Richards & Farmer LLP★ 3.7 (34)Parlee McLaws LLP★ 4.5 (22)Bryan & Company LLP★ 4.1 (25)Witten LLP★ 3.9 (54)

See all Edmonton law firms · All Alberta law firms

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General information for readers in Alberta, not legal advice for any specific situation. Laws, thresholds and deadlines change, so confirm current rules with a lawyer before relying on anything above. LawDB is an independent directory and is not affiliated with Reynolds Mirth Richards & Farmer LLP; firm details come from the firm’s own published descriptions and public listings.