Social Media Defamation Law Australia: Can You Sue?

KPA Lawyers | Melbourne
30 July 2026  ·  5 min read

KPA Lawyers | Melbourne

In today’s social media age, a single post, video, comment, or review can damage a reputation within seconds and reach thousands of people before it’s even taken down. What used to require a newspaper or broadcaster to do damage can now be done by anyone with a phone and an internet connection. Your reputation or the reputation of your business is now at the mercy of anyone’s fingertips.

So what actually counts as social media defamation under Australian law, and when is it worth speaking to a defamation lawyer about taking further action? This article walks through what social media defamation is, what you need to prove to bring a claim, and how our Melbourne defamation lawyers can help if it’s happened to you.

What is Defamation?


The governing legislation for Defamation in Victoria is the Defamation Act 2005 (Vic) and corresponding Acts in other States and Territories. Defamation is the publication of material about a person which causes serious harm to an individual’s reputation, either professionally or personally. When this publication occurs online it’s usually called online or social media defamation. The publication can include communication to at least one third party and covers social media posts, videos, comments, reviews and messages. The previous distinction between libel and slander has now been abolished, so any online written content and spoken content (for example a video defaming someone) are treated under a single statutory framework.

The Defamation Act 2005 (Vic) operates concurrently with common law principles, which have been adapted to deal with the development of social media platforms such as Facebook, Instagram, Twitter, TikTok, Google reviews and any other social media platform. The Courts have consistently held the view that reputational harm online can have profound ramifications because of the ease of widespread sharing and permanence of the content, particularly where publications are rapidly disseminated beyond the original audience.

In the case of BeautyFull CMC Pty Ltd & Ors v Hayes [2021] QDC 111 the District Court of Queensland found that the Defendants Instagram story and other online communications were defamatory of all four plaintiffs [1]. Judge Reid held that each of the publications posted by the Defendant, which included Instagram stories, a phone call and a Facebook conversation conveyed defamatory imputations about the cosmetic medical clinic, being BeautyFULL CMC Pty Ltd, the founder and the founder’s two children. The imputations conveyed, were found to be intentionally false, baseless, motivated by anger and resentment, and caused hurt, distress and loss of business reputation to the plaintiffs.

The Court awarded damages to each plaintiff, totalling around $80,000.00. The defendant was further restrained from publishing, by any means including on all social media platforms, any further material having the effect of defaming the plaintiffs. Notably, this is the first Australian Defamation case, whereby the judgement dealt specifically with Instagram stories, enforcing that even temporary social media posts and content can still be subject to a Defamation claim.

Serious Harm Test – Can you Sue?

To have a claim in social media defamation, the plaintiff must prove four key elements, which include, publication, identification, imputation and serious harm, as outlined in Section 10A of the Defamation Act 2005 (Vic) [2]. If these elements are met, it is arguable that a plaintiff will have a strong claim in defamation.

Publication

  • The matter complained of must have first been published to someone other than the plaintiff, which typically occurs when the social media content is downloaded or viewed by others online. 

Identification

  • The publication must identify the plaintiff, either by name, image, social media name, or by circumstances which make them reasonably identifiable to someone or people who know them.

Imputation (Defamatory meaning)

  • The publication must reasonably convey imputations that cause an ordinary reasonable person to think less of the plaintiff. These include, among other things, that the plaintiff is dishonest, has engaged in professional misconduct is in competent, or has broken the law. The imputations form the core of the defamatory matter.

Serious Harm

  • The fourth element a plaintiff must satisfy, is that the publication has caused, or is likely to cause, serious harm to their reputation, or cause significant financial loss for an excluded corporation.
  • The “serious harm” threshold, introduced by recent Defamation Amendment Acts across most jurisdictions, operates as a filtering device that allows courts to dismiss minor or purely “backyard” social media disputes without the need for a full trial.
  • When deciding whether serious harm is established, courts consider matters such as how grave the imputations are, the nature and size of the audience, any evidence of sharing or “grapevine” spread, and whether there is actual or probable impact on the plaintiff’s employment, social relationships or financial position.

How KPA Lawyers can assist with defamation issues


If you consider that a publication has been made about you, that on its merits meets the above criteria, we encourage you to get in contact with us to discuss how we can assist you in removing the material and working towards rebuilding your online reputation. We note that the statutory limitation to bring a claim in Defamation is one year from the date of the original publication of material.

REferences

[1] BeautyFull CMC Pty Ltd & Ors v Hayes [2021] QDC 111

[2] section 10A, Defamation Act 2005 (Vic)

Article Authors

Reading Time
5 minutes
Published
30 July 2026
Practice Area
Disputes & Litigation

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The information contained in this article is of a general nature only and does not constitute legal advice. It has been prepared by KPA Lawyers without considering your specific objectives, circumstances or needs, and should not be relied on as a substitute for tailored legal advice.

While KPA Lawyers takes reasonable care to ensure that the information is accurate and current at the time of publication, we do not warrant its accuracy, completeness or currency and the law may change after the publication date. You should obtain legal advice from a lawyer before acting or relying on any information in this article.

Accessing or reading this article does not create a solicitor-client relationship with KPA Lawyers. To the fullest extent permitted by law, KPA Lawyers, its principals and employees disclaim all liability for any loss or damage arising from reliance on the information contained in this article. Liability is limited by a scheme approved under professional standards legislation.

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