Opt-Out Notices: Complying With Australian Privacy and Spam Laws

If you market your business by email, SMS, phone, or even targeted online ads, you’ve probably seen (or used) an “unsubscribe” link or a “STOP to opt out” message.

That small line is more than a courtesy - it’s often the legal mechanism that helps you comply with Australian spam and privacy requirements. In other words, it’s your opt-out notice.

For small businesses, the challenge is that marketing happens fast: you’re collecting leads, running campaigns, and following up with customers. But the rules about consent, transparency, and letting people opt out don’t slow down just because you’re busy.

Below, we’ll walk you through what an opt-out notice is, when you need it, what it should say, and how to build a compliant process that still lets you market confidently.

What Is An Opt-Out Notice (And Why Does It Matter)?

An opt-out notice is a clear message that tells someone how they can stop receiving marketing communications from you.

In practice, it usually looks like:

• an “Unsubscribe” link in an email footer
• “Reply STOP to opt out” in an SMS campaign
• a checkbox or settings option in an account portal (for marketing preferences)
• a short line in a privacy or collection statement saying how to opt out of direct marketing

It matters for two key reasons:

• It’s legally important - under Australian spam and privacy rules, people must be able to opt out easily.
• It’s commercially important - if people feel trapped on your list, they’ll mark messages as spam, complain, or disengage from your brand.

For most small businesses, your opt-out notice is part of your overall “marketing compliance stack”, alongside your consent process, your CRM settings, and documents like your Privacy Policy.

Which Australian Laws Apply To Opt-Out Notices?

In Australia, opt-out requirements generally show up in a few places:

• spam rules (how you send marketing emails and SMS),
• privacy rules (how you collect and use personal information, including for direct marketing), and
• telemarketing rules (how you make marketing calls, including the Do Not Call Register requirements).

The Spam Act 2003 (Cth): Opt-Out For Marketing Emails And SMS

The Spam Act applies to “commercial electronic messages”, which commonly includes marketing sent by:

• email
• SMS/text message
• instant messaging (in some cases)

It generally does not apply to “targeted online ads” in the same way, because those ads aren’t typically “commercial electronic messages” sent to an electronic address under the Spam Act.

While the detailed requirements depend on the specific message type and circumstances, the key principles for small businesses are:

• Consent (express or inferred) generally needs to exist before you send marketing.
• Identification - your message must clearly identify who you are.
• Unsubscribe/opt-out - your message must include a functional opt-out method that is easy to use.

Two practical requirements that are often missed are that:

• your unsubscribe/opt-out method must remain functional for at least 30 days after the message is sent, and
• opt-out requests must be processed within 5 business days.

If your campaigns include email marketing, it’s worth ensuring your processes align with typical email marketing laws expectations (including how unsubscribe links and suppression lists are handled).

The Privacy Act 1988 (Cth): Transparency And Direct Marketing

Privacy law can also affect opt-out. If your business is covered by the Privacy Act, you’ll generally need to be upfront about:

• what personal information you collect
• why you collect it (including marketing)
• who you disclose it to (for example, email platform providers)
• how someone can complain or get access/correction

Many small businesses are exempt under the “small business exemption” (often if they have an annual turnover of $3 million or less), but that exemption doesn’t always apply and some businesses choose to follow the Australian Privacy Principles anyway (for example, due to customer expectations or partner requirements).

This is where your “privacy transparency” documents matter. Many businesses use both a privacy collection notice at the point of sign-up and a broader Privacy Policy on the website.

Telemarketing And Do Not Call Considerations

If you market by phone, opt-out still matters, but the rules can look different from email/SMS. Telemarketing is primarily governed by the Do Not Call Register framework (including the Do Not Call Register Act 2006 (Cth) and the Telemarketing and Research Calls Industry Standard), so you should factor in things like screening numbers, permitted calling times, and consent mechanics under Australian telemarketing laws.

The takeaway: don’t treat opt-out as “just a footer link” - it’s part of broader compliance across multiple channels.

When Do You Need An Opt-Out Notice In A Small Business?

Most small businesses should assume they need an opt-out notice whenever they’re sending communications that are:

• promotional (selling, upselling, re-engagement campaigns), or
• direct marketing (encouraging a purchase, donation, booking, subscription, or other conversion).

Common scenarios where you should include an opt-out notice include:

• Email newsletters (weekly/monthly updates, promotions, product announcements)
• Abandoned cart emails or “you left something behind” reminders
• SMS promotions (flash sales, booking reminders that also include marketing)
• Lead magnet sequences (downloaded a free guide, then receives a marketing drip)
• Membership/subscription updates where you also cross-sell (even if part of the email is “service” content)

Be careful with “mixed content” messages. For example, a transactional email (“your order has shipped”) might not be treated the same way as a marketing email. But if you add marketing content (e.g. “Plus, check out our 20% off sale”), you may be creating a message that needs a compliant opt-out method.

If your business runs a subscription model, your customer documents (and how you present them online) matter too. Many businesses also pair marketing opt-outs with customer account terms, like subscription terms and conditions, to clearly explain what communications customers will receive and how preferences can be managed.

How To Write A Compliant Opt-Out Notice (With Practical Examples)

A strong opt-out notice is:

• clear (no jargon, no hidden steps)
• easy (one-click unsubscribe or simple reply)
• functional (it actually works, every time)
• fast (you action opt-outs promptly and don’t “re-add” people)

1. Keep The Language Plain

Don’t make people decode what you mean. If it’s marketing, say how to stop marketing.

Email opt-out notice examples:

• “Unsubscribe from these emails”
• “Manage your email preferences”
• “Click here to unsubscribe”

SMS opt-out notice examples:

• “Reply STOP to opt out.”
• “Text STOP to unsubscribe.”

Avoid adding unnecessary friction like “Email us with your request” if a simple unsubscribe function is available. Friction is where complaints start.

2. Make The Opt-Out Mechanism Easy To Use

From a small business perspective, “easy to use” usually means:

• Email: an unsubscribe link that works on mobile and doesn’t require login
• SMS: a reply keyword (like STOP) that your messaging system recognises and processes
• Account-based businesses: a preference centre where users can choose what they receive

If you use a third-party email platform, check your settings to ensure:

• the unsubscribe link is included in every campaign
• unsubscribed contacts are suppressed from future sends
• your data export/import processes don’t accidentally re-subscribe people

3. Identify Your Business Clearly

Even if your opt-out notice is perfect, you still need to clearly identify who is sending the message. This helps customers understand what they’re opting out from and reduces “is this a scam?” reactions.

Good practice includes:

• your business name (matching your branding)
• a contact method (email address, website, or phone number)
• if relevant, your ABN (not always required in the message itself, but often useful in your website footer and legal pages)

4. Match Your Opt-Out Notice To Your Privacy Messaging

Your opt-out notice shouldn’t contradict your broader privacy statements.

For example:

• If your sign-up form says “We’ll send you offers and updates. You can unsubscribe at any time,” your email footer should actually let people unsubscribe easily.
• If your Privacy Policy says people can opt out of direct marketing by contacting you, but you also have an unsubscribe link, it’s fine to offer multiple methods - but make sure both pathways work.

Many businesses handle this by using a short, clear statement at collection (a privacy collection notice) and then linking to a fuller Privacy Policy. If you’re collecting information through a website checkout, booking form, or lead form, it’s worth thinking about whether a privacy collection notice should appear right there on the form (not buried in a footer).

5. Actually Action Opt-Outs Internally (Not Just In Your Tool)

A common mistake is relying on one system (like an email platform) without considering other channels.

For example, if someone opts out of marketing emails, but your team:

• exports the customer list to a spreadsheet and starts manual emailing, or
• adds the lead to an SMS campaign list later

you can end up sending marketing after an opt-out - which is where legal and reputational risk increases.

It helps to treat opt-outs as a “master preference”, and keep a suppression list that is respected across all channels your business uses.

Common Opt-Out Notice Mistakes (And How To Avoid Them)

When you’re moving quickly, it’s easy to set up marketing in a way that feels normal - but isn’t compliant. Here are some pitfalls we often see with growing businesses.

Using Pre-Ticked Consent Boxes

Pre-ticked boxes (especially for marketing) are risky because they can undermine the quality of consent. A clearer approach is an unticked checkbox with plain wording, or a double opt-in approach where appropriate.

Hiding The Unsubscribe Link Or Making It Hard To Find

An opt-out notice should be easy to locate and easy to use. If it’s tiny, low-contrast, buried in a wall of text, or disguised as something else, it can create complaints and deliverability issues - and it doesn’t align with the intent of the law.

Breaking The Unsubscribe Function

If your unsubscribe link is broken, routes to a dead page, or requires login, you’re creating risk. Regularly test your opt-out links and SMS STOP workflows as part of your campaign checklist.

Not Respecting Opt-Outs Across Related Entities Or Business Units

If you operate multiple brands, locations, or business units, it’s important to be clear about:

• which entity is sending the messages
• whether an opt-out applies to just one brand or all

This is also a good reason to keep your internal records clean and your customer-facing terms consistent.

Collecting Data For Marketing Without Proper Transparency

If you collect emails or phone numbers via checkout, quote forms, or bookings, customers should understand what happens next - including whether they’ll receive marketing.

This also connects with broader compliance obligations, especially if you collect payment details or other sensitive information. If you store payment details for repeat billing (for example, subscriptions), make sure you handle it carefully and transparently - including in your customer documents and privacy messaging around storing credit card details.

Key Takeaways

• An opt-out notice is your clear instruction to customers on how to stop receiving marketing - and it should be easy, functional, and consistent across channels.
• Australian small businesses should think about opt-out compliance under both spam rules (for email/SMS marketing) and privacy rules (for transparency and direct marketing practices).
• Most marketing emails and SMS campaigns should include a clear opt-out method, and mixed “transactional + promotional” messages need extra care.
• Strong opt-out notices use plain language (“Unsubscribe”, “Reply STOP”) and don’t add friction like logins or manual requests when a simple method exists.
• Operationally, you should respect opt-outs across your tools and team workflows - not just within one marketing platform.
• Pair your opt-out process with the right legal foundations, including privacy messaging at collection points and well-drafted customer terms.

This article is general information only and doesn’t constitute legal advice. If you’d like help setting up your marketing compliance (including opt-out wording and processes, a Privacy Policy, and customer terms), you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.