When Silence is Deceptive: Understanding Misleading and Deceptive Conduct vs Defamation in Australian Business Disputes

According to Australian corporate law, when comparing misleading and deceptive conduct versus defamation, Australian business owners often discover a surprising truth: the remedy they cannot access (defamation) may be less powerful than the one sitting right in front of them. Section 18 of the Australian Consumer Law, along with its predecessor section 52 of the Trade Practices Act 1974, has quietly become one of the most effective tools for protecting commercial reputation in this country.

The uniform defamation laws, which commenced in New South Wales on 1 January 2006, generally exclude corporations employing ten or more persons from standing to sue for defamation. This legislative change, intended to prevent large companies from silencing legitimate criticism, created an unexpected gap in corporate reputation protection. A more potent alternative filled that gap: a strict liability regime where silence itself can constitute actionable misconduct. The legal definition of an employee for this purpose is interpreted broadly to include independent contractors engaged in day-to-day operations, meaning only those entities with fewer than ten employees retain the right to sue.

The Doctrine of Silence as Misleading Conduct

Legal precedent establishes that Australian courts have consistently held that failing to disclose material information can breach section 18 of the Australian Consumer Law. This principle runs directly counter to the common law position that mere silence cannot constitute misrepresentation. The Federal Court decision in Demagogue Pty Ltd v Ramensky (1992) 39 FCR 31 established that silence, in the context of a commercial relationship, can be just as deceptive as an express falsehood.

In that case, a property developer failed to disclose that vehicular access to a development site required a road licence over public land. The purchasers saw plans showing a driveway. They asked about access and were told it would be built. What they were not told was that the driveway would cross land the developer did not own and might never own. The Federal Court found this silence constituted misleading conduct, even though no false statement was made.

Justice French (as his Honour then was) articulated the principle in Kimberley NZI Finance Ltd v Torero Pty Ltd [1989], a position subsequently cited with approval in the Demagogue proceedings: conduct which conveys a particular representation may be misleading even though every word spoken is literally true, if the overall impression created is false. The ACCC’s current guidance on false or misleading claims reflects this same principle.

Why Misleading Conduct Outperforms Defamation for Business Disputes

The comparison between misleading and deceptive conduct versus defamation reveals several advantages for corporate claimants pursuing the consumer law pathway.

First, there is no requirement to prove damage to reputation. Under section 18, a claimant need only establish that conduct was misleading or likely to mislead. This is an objective test focused on the conduct itself, not its consequences. Compare this to defamation, where the plaintiff must demonstrate the publication lowered their standing in the eyes of right-thinking members of society.

Second, section 18 imposes strict liability. There is no need to prove intention or negligence. If conduct was objectively misleading in trade or commerce, liability attaches regardless of the defendant’s state of mind. Defamation, by contrast, allows defendants to raise defences including honest opinion, qualified privilege, and justification.

Third, the remedies available under the Australian Consumer Law are extensive. Section 236 provides for compensatory damages. Section 237 permits the court to make any order it considers appropriate, including injunctions, declarations, and orders varying or setting aside contracts. In appropriate cases, courts have ordered corrective advertising, public apologies, and the removal of damaging content.

The “Trade or Commerce” Requirement

Section 18 applies only to conduct “in trade or commerce.” This phrase has been interpreted broadly to include business negotiations, commercial advertising, and dealings between businesses. It does not extend to purely private communications or statements made outside a commercial context.

For businesses facing reputational attacks, this requirement is usually satisfied when the damaging conduct occurs in a commercial setting. A competitor’s false statements about your products, a former employee’s misleading representations to your clients, or a supplier’s deceptive conduct in negotiations all fall within the statutory scope.

The Federal Court has confirmed that communications to potential customers, trade publications, and industry bodies constitute conduct in trade or commerce. Even social media posts can qualify if made in connection with business activities. The BPS Financial judgment provides instructive analysis on how courts distinguish between commercial and non-commercial contexts.

Establishing Misleading Conduct: The Legal Elements

A successful claim under section 18 requires proof of three elements: conduct by the respondent, that the conduct was in trade or commerce, and that the conduct was misleading or deceptive or likely to mislead or deceive.

The test for whether conduct is misleading is objective. Courts ask whether a reasonable person in the position of the target audience would be misled. The relevant audience depends on the circumstances. For advertising directed at consumers, courts consider the hypothetical ordinary consumer. For business-to-business communications, the standard is that of a reasonable businessperson.

Silence becomes actionable when, in the circumstances, a reasonable person would expect disclosure. The Demagogue case identified several factors relevant to this assessment: the nature of the transaction, the relationship between the parties, what information the silent party possessed, and whether the other party could reasonably be expected to discover the information themselves.

In property transactions, courts have found silence misleading where sellers failed to disclose structural defects, contamination, development restrictions, and access limitations. In commercial negotiations, silence about financial difficulties, pending litigation, or material changes in circumstances has attracted liability.

The Half-Truth Doctrine

Particularly relevant to reputation disputes is the half-truth doctrine. A statement may be literally accurate yet misleading because of what it omits. If a competitor publishes a comparison showing your product failed certain tests, but omits to mention that their product failed the same tests, the overall impression may be misleading even though each individual statement is true.

This doctrine has particular application to online reviews, media commentary, and industry reports. Selective disclosure of facts, presented in a way that creates a false overall impression, can constitute misleading conduct regardless of the technical accuracy of each component statement.

Remedies and Enforcement Strategies

The remedial provisions of the Australian Consumer Law offer flexibility that defamation remedies cannot match. Section 232 permits the court to grant injunctions in terms it considers appropriate. Section 237(1) allows courts to make orders to compensate for loss or damage, prevent or reduce loss or damage, or to refund money or return property.

For businesses facing ongoing reputational harm, interlocutory injunctions can provide immediate relief. Courts have granted interim orders requiring the removal of misleading content, the cessation of damaging communications, and the publication of corrective statements. The balance of convenience test in interlocutory applications often favours the plaintiff where the defendant’s conduct is clearly misleading.

Damages under section 236 compensate for loss or damage “because of” the contravening conduct. This includes economic losses such as lost sales, reduced market share, and the cost of corrective advertising. It also extends to consequential losses flowing from the misleading conduct, provided they are not too remote.

Courts have awarded damages for loss of business opportunity, increased operating costs, and diminution in business value. In Henjo Investments Pty Ltd v Collins Marrickville Pty Ltd (1988) 39 FCR 546, the Full Federal Court confirmed that damages should place the applicant in the position they would have occupied but for the contravening conduct.

Australian Business Reputation Protection: Strategic Considerations

When selecting between available causes of action, Australian business reputation protection law requires careful analysis of the specific circumstances. Misleading conduct claims offer advantages in terms of strict liability and broad remedies, but they require a commercial context and conduct that objectively misleads.

Injurious falsehood remains available to corporate plaintiffs and may be preferable where the defendant’s malice can be established. This tort requires proof of a false statement, publication to third parties, malice, and actual damage. The malice requirement makes it harder to establish than misleading conduct, but it does not require a trade or commerce connection.

Interference with contractual relations and interference with business by unlawful means provide additional options where the defendant’s conduct has disrupted specific business relationships. These torts require proof of intentional interference and, in the latter case, unlawful means directed against the plaintiff or a third party.

Academic analysis by Cambridge researchers comparing Australian, English, and Canadian approaches confirms that Australian law provides corporations with viable alternatives to defamation that do not exist in other common law jurisdictions to the same extent.

Concurrent and Alternative Claims

Complex reputation litigation often involves pleading multiple causes of action in the alternative. A single course of conduct may give rise to claims in misleading conduct, injurious falsehood, and interference with business relations. Pleading alternatives preserves options and maximises the prospects of relief.

The interaction between these causes of action requires careful attention. Misleading conduct is established on the balance of probabilities with no requirement for intention. Injurious falsehood requires proof of malice but offers damages at large. Interference torts require intentional conduct but provide access to exemplary damages in appropriate cases.

Data breach incidents can create overlapping exposures, as the Medlab case analysis demonstrates. Silence about security vulnerabilities or breach incidents may constitute misleading conduct in ongoing commercial relationships while also exposing directors to personal liability.

Practical Application: Building Your Case

Successful misleading conduct claims require contemporaneous evidence of the conduct, its commercial context, and its misleading character. Businesses facing reputational attacks should document the conduct immediately, preserve electronic evidence, and identify witnesses who can speak to the impression created.

Expert evidence may be necessary to establish that conduct was misleading in a specialised industry context. Market research evidence can demonstrate how target audiences actually understood the impugned conduct. Financial evidence quantifies the loss flowing from the contravention.

The limitation period for misleading conduct claims is six years from the date the cause of action accrued, typically when loss was first suffered. This compares favourably to the one-year limitation period for defamation claims in most Australian jurisdictions.

For corporations excluded from defamation remedies, the Australian Consumer Law provides a rigorous and effective alternative. The doctrine that silence can be deceptive, combined with strict liability and broad remedial powers, makes section 18 a powerful instrument for protecting commercial reputation against bad actors who trade in half-truths and strategic omissions.

About Adam ZuchowskiAdam Zuchowski is a litigation partner at Sutton Laurence King. He advises individuals and businesses on construction disputes, contractual matters, defamation, insolvency and debt recovery. Adam takes a calm, practical approach to dispute resolution.