Why 'limited time only' is quietly killing your ads — and the legal risk in AU/NZ
Every cafe and tradie uses scarcity language without checking if it’s legal. The Fair Trading Act 1986 (NZ) and the Australian Consumer Law say specific things about how you frame “limited” — and most ads quietly cross the line.
Open Instagram on a Sunday morning. Scroll past three cafe posts, two retail stores, one tradie. Count how many say something like:
- • “Limited time only!”
- • “Last few left”
- • “Don’t miss out”
- • “This week only”
- • “Hurry, ends Sunday” (when it doesn’t actually end Sunday)
Almost all of these are written by someone who genuinely meant it to be honest. But here’s the thing: in AU and NZ, scarcity language isn’t free vocabulary. It’s a regulated claim. And the regulator’s test isn’t “did you mean to mislead?” — it’s “would a reasonable customer be misled?”
What the law actually says
The NZ Fair Trading Act 1986, section 9, prohibits any conduct in trade that is misleading or deceptive, or likely to mislead or deceive. It doesn’t require intent. If your post implies urgency or scarcity that isn’t real, you can be liable.
The Australian Consumer Law (ACL), particularly s 18 and s 29, says the same thing in different words. The ACCC has gone after businesses for “limited time only” promotions that ran for months — even when nobody complained.
Both laws zoom in on three specific traps small businesses keep falling into:
The three traps
1. Scarcity without numbers
“Limited stock” without saying how many is the most common trap. If you wrote “only 3 left” you’d be making a claim you can verify. “Limited” alone implies a number that doesn’t exist on your shelves — and that’s the regulator’s opening.
Fix: Either say the actual quantity (“15 boxes in stock today”) or drop the scarcity framing entirely. Don’t fudge.
2. Time framing without an end date
“This weekend only” in a post that stays pinned for three months is misleading by default — even if nobody complains. The post itself doesn’t expire automatically.
Fix: Either use a specific date (“Sat 14 – Sun 15 June only”) and delete/archive the post on Monday, or remove the time framing. “Available now” is fine and legal.
3. Comparative claims without proof
“Best coffee in Wellington”, “cheapest plumber in Auckland”, “voted #1”. These claim a fact that’s measurable but rarely measured. If a competitor wanted to fight, you’d have to prove it.
Fix: Either back the claim with a real award/survey (and link to it), or use a softer frame — “a local favourite for over a decade”, “the sparky most of our Khandallah customers call back twice”. Specific beats hyperbolic.
What customers actually want
Here’s the irony: most of the scarcity language doesn’t even work anymore. People have been seeing “limited time only” on every ad for fifteen years. It’s become noise. The customers who’d actually book or buy are the ones who trust your post — and trust comes from specifics, not urgency theatre.
Compare these two openers for a Saturday cafe special:
“Limited time only! Don’t miss our weekend special! Hurry, going fast!”
“Flat white + croissant, $8. This Sat & Sun, in-house only.”
The second one is more honest, more specific, more legally safe — and almost certainly converts better. It treats the reader like an adult who can decide on facts.
The Marlaio approach
We built Marlaio to refuse scarcity language by default. If the AI tries to write “limited time only” without you providing actual inventory numbers or dates, our compliance layer rejects the draft before you see it. We’d rather block a draft than ship one that quietly crosses the line.
Some customers find this annoying at first (“but my old agency said it’s fine!”). After their first month they usually thank us. We’d rather ship 3 honest drafts than 4 with a misleading one — and the law agrees.
Disclaimer: This post is general commentary, not legal advice. If you’re unsure whether a specific ad is compliant, talk to a Commerce Commission (NZ) or ACCC (AU) helpline or a real lawyer. The penalties for misleading conduct in AU/NZ are significant — up to NZ$600,000 (FTA) or AU$10 million (ACL) for companies in the worst cases.
Want marketing that doesn’t accidentally break the law?
Marlaio drafts your social posts, emails, and ads — refusing scarcity claims that aren’t backed by real numbers. Built for AU and NZ small business.
Written by the founder. Drafted with AI assistance, reviewed and signed off before publish — same way we ask our customers to work with their packs.