If you’ve been served with a concerns notice or sued for defamation in Australia, understanding the available defences is critical to your case. This factsheet outlines the principal defences under the Defamation Act 2005 and common law, when they apply, and how they interact.
Having a strong defence can mean the difference between a substantial judgment against you and a successful dismissal of the claim. Early legal advice is essential; the earlier you engage a solicitor, the greater your options.
Key Takeaways
- Truth is the most powerful defence; if the statement is substantially true, the defamation claim must fail.
- The contextual truth defence may protect you even where specific defamatory imputations were not proven true, provided other true imputations in the same publication caused no additional harm.
- Honest opinion protects genuinely held views on proper material and matters of public interest, even where those views caused reputational harm.
- Absolute or qualified privilege covers statements made in official proceedings, out of legal duty, or in circumstances of legitimate reciprocal interest.
- Separate statutory defences exist for publication of public documents, fair report of proceedings of public concern, and defamatory material published in a scientific or academic journal.
- Digital intermediaries, including internet service providers and search engine providers, may rely on innocent dissemination where they had no knowledge that defamatory matter had been published through their platform.
- Multiple defences can be raised together; strategy and sequencing matter.
- Apology and retractions reduce damages but do not prevent defamation actions from proceeding.
- The limitation period in most Australian states is one year from the date of publication, extendable to three years in limited circumstances. Act quickly.
Contact O’Brien Criminal & Civil Solicitors Immediately If:
Do not delay. Call O’Brien Criminal & Civil Solicitors on 02 9261 4281 immediately. |
Truth (Justification) Defence
The most powerful defence to a defamation claim is truth. Under the Defamation Act 2005, if the statement you made was substantially true, the plaintiff complains in vain; the claim must fail, even if the statement caused serious reputational harm.
The defence of justification, sometimes called a justification plea, does not require the matter complained of to be accurate in every minor detail. Courts focus on whether the sting of the alleged defamatory imputations was true. A court will assess whether the essential substance of what was published was accurate, not whether every peripheral fact was exact.
The defendant proves the truth on the balance of probabilities. For example, if the plaintiff claims a statement about a fraud conviction was defamatory, and the conviction is established, the defence applies even where minor details about the amount or court were slightly wrong. Substance controls, not particulars.
Honest Opinion Defence
The honest opinion defence protects statements that are genuinely held opinions on matters of public interest, even where those opinions are wrong or damaging to reputation. It does not protect statements of fact.
For this defence to succeed:
- The statement must be an expression of opinion, not a statement of fact
- It must be based on proper material, facts that are true or made under privilege
- It must have been published honestly, meaning you genuinely held the opinion at the time of publication
- The opinion must relate to a matter of public interest or public concern
The defamatory imputations arising from the opinion must flow from the opinion itself, not from false statements of fact embedded within it. This defence is commonly relied upon by journalists, critics, and commentators expressing strong views on the conduct of public figures and institutions. Framing a statement as personal belief is not sufficient if its substance conveys a false imputation of fact.
Qualified Privilege Defence
The defence of qualified privilege protects statements made in circumstances where the speaker has a duty or legitimate interest to communicate information, and the recipient has a corresponding interest in receiving it. It is one of the common law defences that has been partially codified under the Defamation Act, and its operation in Australian courts continues to be shaped by case law from the Supreme Court through to the High Court.
This defence commonly applies to:
- Employment references given to prospective employers
- Reports made to regulatory or licensing authorities
- Communications within professional associations
- Statements made in an official capacity to a parliamentary body, local government authority, or government agency
- Communications to persons with a direct and legitimate interest in the subject matter
The defence of qualified privilege is lost if the plaintiff establishes malice, meaning you knew the statement was false, were reckless about its truth, or were primarily motivated by spite rather than any genuine duty or interest.
Absolute Privilege Defence
Absolute privilege provides complete immunity from defamation liability, regardless of the truth of the statement or the motive of the speaker. It cannot be defeated even by proof of malice or deliberate falsehood.
It applies to statements made in the course of judicial or parliamentary proceedings, fair and accurate contemporaneous reports of court proceedings, and fair and accurate reports of parliamentary proceedings. Witnesses, lawyers, parliamentarians, and other participants in these proceedings speak with absolute privilege within the scope of those proceedings.
Public Interest Defence
The public interest defence was codified in the Defamation Act 2005 and protects publishers who disseminate matters of genuine public concern. It is most commonly relied upon by journalists, activists, and organisations publishing information about corporate misconduct, environmental harm, or the conduct of public figures.
To succeed, the statement must relate to a matter of public interest, the publisher must have reasonably believed the statement was true at the time of publication, the publisher must not have acted with recklessness or serious disregard for truth, and publication must have been reasonably necessary for the purposes of informing the public on the matter in question.
Innocent Dissemination Defence
The innocent dissemination defence applies to those who distributed a defamatory statement but did not originate it. It protects secondary publishers, such as online platform operators and internet intermediaries who host third-party content, who had no knowledge the material was defamatory and were not negligent in failing to detect it.
To establish this defence, you must show that you did not know the material was defamatory, that you were not negligent in failing to know this, and that you did not know the identity of the original publisher. Importantly, once a platform operator or secondary publisher is put on notice that content is defamatory, continued hosting may defeat this defence.
How Defences Interact
Multiple defences can be raised together in defamation proceedings. This is both permitted and strategically important, you are not required to elect a single defence, and your overall case may be stronger for presenting alternatives.
The approach should be to lead with your strongest defence, while pleading alternative defences in case the primary argument fails. Care must be taken not to concede facts through the pleading of one defence that would undermine another. Your solicitor will assess which combination of defences best fits the available evidence and the specific imputations the plaintiff has pleaded.
Burden of Proof
The burden of proof in defamation proceedings varies depending on the issue. The plaintiff bears the initial burden of proving that the statement was published to a third party, that it identified the plaintiff, and that it carries a defamatory meaning, all on the balance of probabilities.
Once defamation is established, the burden shifts to the defendant to prove the elements of the relevant defence. For truth and honest opinion, the defendant must prove those elements on the balance of probabilities. Where the plaintiff seeks to defeat a qualified privilege defence by alleging malice, the burden of proving malice rests with the plaintiff.
Frequently Asked Questions
“I heard someone say it”, is that a valid defence?
No. Repeating a defamatory statement made by another person does not give you a defence based on the original speaker’s knowledge. You are independently liable for the publication of that statement unless you can establish a defence, such as qualified privilege or innocent dissemination, in your own right. The fact that someone else originally made the statement is not itself a defence.
Can I claim truth if I believed something but did not verify it?
No. The truth defence requires you to establish that the statement is in fact true, not merely that you believed it to be true at the time. Honest belief, however sincere, is not a substitute for proof. If you made a statement you believed was true but cannot now establish its truth with evidence, you will need to rely on a different defence.
What if the person suing me is a public figure?
Under Australian law, public figures have the same right to sue for defamation as private individuals. However, their public conduct and role are relevant to the honest opinion and public interest defences, statements about public figures on matters of public concern attract stronger protection under those defences. Your solicitor can advise on how the plaintiff’s public profile affects the strength of your available defences.
If I apologise and retract, does that end the lawsuit?
An apology and retraction are relevant to the quantum of damages, a court is likely to award a lower amount if you acted promptly to minimise harm. However, they do not constitute a defence and do not prevent the claim from proceeding. In some cases, a timely offer of amends under the Defamation Act 2005, combined with a genuine apology, can lead to settlement before litigation. Your solicitor can advise on whether this approach is appropriate to your situation.
Need a Defamation Lawyer?
If you have been served with a defamation concerns notice or a claim has been filed against you, contact O’Brien Criminal & Civil Solicitors immediately on 02 9261 4281 or complete the enquiry form on our website. Time is critical, the earlier you receive legal advice, the better your prospects.
