Yes, you can sue for defamation over online posts, reviews, videos and comments, but only when what was published identifies you, conveys a defamatory meaning and, in Australia and in England and Wales, has caused or is likely to cause serious harm to your reputation. Being insulted, mocked or harshly criticised is usually not enough. The same rules run the other way: commentary, reaction and review creators can be sued over false statements of fact about real people and businesses. Deadlines are short. In both Australia and England and Wales the usual limit is one year from publication, and under Australia's reformed defamation law, as in Queensland, a written concerns notice must come before any claim.
This guide covers both sides for creators. Threats and harassment are a separate problem with faster remedies, covered in what to do if a fan threatens you, and demand letters in general are covered in cease and desist letters for creators. Defamation law is technical and varies by state and country. This is general information, not legal advice.
What makes a post defamatory
The core question everywhere is whether the publication damages someone's reputation in the eyes of others. YouTube's defamation help page describes it as content that harms someone's reputation or causes them to be shunned or avoided. Cornell's Legal Information Institute summarises the usual US elements in its defamation entry: a false statement presented as fact, publication to a third party, the required level of fault, and harm.
The line between fact and opinion decides many creator disputes. The same entry notes that statements which cannot reasonably be read as stating actual facts are protected in the US, while opinions that imply provably false facts may not be. England and Wales has a statutory honest opinion defence in section 3 of the Defamation Act 2013: the statement must be an opinion, it must indicate the basis for the opinion, and an honest person could have held it on facts that existed at the time. Australia's honest opinion defence asks whether the matter was opinion rather than fact, related to a matter of public interest, and was based on proper material.
In Australia and in England and Wales, truth is a defence that the publisher has to prove. Under Australia's uniform law the defence of justification requires the defamatory imputations to be substantially true, so “I believed it” is not enough. In the US, the Legal Information Institute lists a false statement among the elements the person suing has to establish.
The serious harm threshold
Section 1 of the Defamation Act 2013 says a statement is not defamatory unless its publication has caused or is likely to cause serious harm to the claimant's reputation, and for a body that trades for profit that means serious financial loss. The section applies in England and Wales; Scotland and Northern Ireland have their own rules.
Australia's defamation law is state-based but follows national model provisions, and the states and territories adopted the recent reforms on different dates. Queensland's current Defamation Act 2005 is a useful example. Section 10A makes serious harm to reputation an element of the claim, decided by the judge, who can deal with it before trial. Section 9 of the same Act stops most companies suing at all: a corporation can only sue if it is not for profit, or has fewer than 10 employees and is not part of a group, and section 10A then requires it to show serious financial loss. A small creator business may qualify; a larger brand usually cannot sue in its own name.
Defamation risk checklist for commentary videos
Run this before publishing any video, thread or review that says something negative about an identifiable person or business.
- Mark every factual claim in your script and ask what evidence you could show a court for it today.
- Present the facts first and your opinion second, and show the basis for the opinion on screen: the clip, receipt, message or document you are reacting to.
- Do not assume hedges protect you. Phrases like “allegedly” or “just asking questions” may not stop viewers taking a statement as fact.
- Treat accusations of serious crime, sexual misconduct or professional incompetence as the highest risk; the Legal Information Institute notes that US law has traditionally treated statements like these as defamation per se, where damages can be presumed without proof of financial loss.
- Check what you repeat. Passing on someone else's accusation can make you responsible for publishing it as well.
- Read your title, thumbnail and pinned comment on their own. Many viewers see only those, and they can carry a meaning the video later softens.
- For serious claims, ask the person for their side and include it. Australia's public interest defence lets courts consider whether you did, and whether you separated suspicions, allegations and proven facts.
- Moderate your comments and give people a visible way to complain about them. A creator can be drawn into claims about comments others leave on their page.
- Keep your research, drafts, sources and any request for comment with the published file.
- Correct mistakes quickly and visibly, and get advice before negotiating, because Australian law has a formal offer to make amends process with its own rules.
Commentary that uses the subject's own footage raises copyright questions too; the guide to reaction videos and fair use covers that side.
On comments, Queensland's Act was amended in 2025 to add a defence for “digital intermediaries”, defined as people other than the author or poster who provide or administer the online service where the matter appears. Under section 31A of the Queensland Act, the defence needs an accessible complaints mechanism and, after a written complaint, reasonable steps to prevent access within 7 days. Whether a creator who runs a page or comment section counts as an intermediary is a legal question, but a clear complaints route and prompt action help either way.
If someone defames you: response options
| Option | Suits | Watch out for | Likely outcome |
|---|---|---|---|
| Ignore and monitor | A one-off insult with little reach | Save evidence anyway, because the time limit runs from publication | Nothing, unless the post spreads |
| Reply publicly | A factual error you can correct with evidence | A reply can amplify the post and invite a pile-on | Sometimes a correction or a deletion |
| Report to the platform | Posts that also break harassment, privacy or other platform rules | Platforms rarely judge truth and may ask for a court order | Removal under platform rules, or blocking in your country |
| Concerns notice or letter | A serious, false factual claim by someone you can identify | In Australia the notice has required contents and must come before any claim | An apology, correction, removal or offer to make amends |
| Lawyer and court | Serious harm you can show, against a publisher you can find | Cost, time, and the attention a case can bring to the claim | Damages, an injunction or a removal order |
Platform reports have strict formats. YouTube's defamation complaint requirements ask for each video URL and the exact statements you say are defamatory, warn that “the whole video” is not valid, require a declaration that the notice is true and complete, and say the uploader will be notified, so state if you do not want your legal name and email shared. Its country page says claims need to be specific and strongly supported, that some need a court order, and encourages you to contact the uploader first. Meta says its defamation reporting form may not be available in your location and does not guarantee removal, though the post may still break its bullying and harassment rules.
eSafety is not the route for reputation. Its page on police and legal help says the Online Safety Act is not designed for reputational harm caused by defamatory material, that you should get legal advice if you want to sue someone for harming your reputation, and that community legal centres and Legal Aid do not usually take defamation matters.
Australia: concerns notices and the one-year clock
Under section 12A of Queensland's Act, a concerns notice must be in writing, say where the matter can be found (for example a web address), set out the defamatory imputations you say it carries and the serious harm it caused or is likely to cause, and include a copy of the matter if practicable. Section 12B says proceedings cannot start until you have given that notice and the period for the publisher to make an offer to make amends has passed. The Limitation of Actions Act 1974 then sets a 1-year limit from publication, with a short extension when a concerns notice is given in the last 56 days before that limit runs out. Check the equivalent provisions in your own state with a lawyer, but plan on that timetable.
England and Wales, and the United States
In England and Wales, the 2013 Act adds truth, honest opinion and public interest defences, a defence for website operators that did not post the statement, and a single publication rule. Section 4A of the Limitation Act 1980 bars defamation actions brought more than one year after the cause of action accrued, and the court rules list a dedicated pre-action protocol for defamation that sets out how to begin.
US defamation is mostly state law, shaped by the First Amendment. The Legal Information Institute explains that public officials and public figures must prove actual malice, meaning publication with knowledge of falsity or reckless disregard for the truth, by clear and convincing evidence, while states may apply a lower negligence-based standard to private plaintiffs. Well-known creators can be treated as public figures, which makes their claims harder. Platforms are generally not the target: 47 U.S.C. section 230 says no provider or user of an interactive computer service shall be treated as the publisher of information provided by someone else. For countries not listed in its defamation form, YouTube says YouTube.com is governed by US law, that it does not remove videos because of defamation allegations, and that complainants should pursue the person who posted, adding that it may comply with a court order.
Cross-border claims are harder still. Under 28 U.S.C. section 4102, US courts will not recognise or enforce a foreign defamation judgment unless the foreign law gave at least as much free speech protection as the First Amendment, or the defendant would have been liable under US law anyway. Winning in Australia or England against a poster based in the US may not get you paid.
When to call police, eSafety or a defamation lawyer
- Police first if a post threatens you, publishes your address or urges others to harm you. That is a safety matter, not a reputation one.
- eSafety if, in Australia, content targeting you is seriously harmful abuse and the platform has not acted, even where it is also defamatory.
- A defamation lawyer within weeks, not months, of a serious false claim, given the one-year limit and the notice steps that must come first.
- A lawyer as soon as you receive a concerns notice or legal letter about your own content, before you reply, edit or delete anything.
- Your insurer, if you hold media liability cover; the creator insurance checklist lists the questions to ask about defamation claims.
Limitations of this guide
This is general information drawn from legislation and official guidance as published when checked on 2 October 2026, not legal advice. Australian defamation law is set state by state, and the reforms described here commenced on different dates in different places; Queensland's Act is used as an example, not as the law of every state. Defences, deadlines and remedies depend on the exact words, where they were read and who published them, which only a lawyer who has seen the material can assess. Nothing here helps you identify an anonymous poster, and eSafety's page on what its adult cyber abuse team does not do says it cannot provide the identity behind an anonymous or fake account either.