Why Your .com.au Domain Must Be Linked to a Valid ABN or ACN

What is a .com.au domain?

A .com.au domain is designed for Australian commercial use. It is commonly used by Australian businesses, companies, sole traders and other eligible organisations.

To register a .com.au domain, the registrant needs to provide valid business details such as an ABN, ACN or Australian trade mark details. The domain name also needs to be connected to the business or entity registering it.



For example, if a plumbing business called Smith Plumbing Pty Ltd registers smithplumbing.com.au, the connection is clear because the domain relates to the business name.

Why does auDA care about this?

auDA is the organisation responsible for administering Australian .au domain names. Its rules are designed to keep Australian domain names trusted, accurate and connected to eligible Australian entities. The .au Licensing Rules set out the requirements that registrants must meet to register and continue holding a .au domain name.

This means that a .com.au domain should not be registered with random, outdated, or unrelated business details.

The registrant details matter.

Who should the .com.au domain be registered under?

The domain should be registered under the entity that is legally eligible to hold it.

That could be:

• A company with an ACN
• A sole trader with an ABN
• A partnership with an ABN
• A registered business name connected to an ABN
• An eligible Australian trade mark holder
• Another eligible Australian commercial entity under auDA’s rules

As a website company, we may manage the domain, DNS records, website connection and renewals for a client. But the domain itself should still be linked to the client’s valid ABN, ACN, or other eligible business details.

This is important because if the domain is registered under the wrong ABN, an old business, a cancelled company or an unrelated third party, it can create problems later.

What happens if the ABN or ACN is cancelled?

If the ABN or ACN connected to a .com.au domain is cancelled, the domain may no longer meet eligibility requirements.

This can become a serious issue because the domain may be needed for more than just the website. In many cases, the domain is also connected to:

• Google Workspace email
• Website hosting
• DNS records
• Online booking systems
• CRM systems
• Payment systems
• Marketing platforms
• Google Business Profile
• Social media links
• Online directories
• Printed business cards and signage



When a domain is at risk, it is not just a website issue. It can affect the whole business.

What if your email is connected to the domain?

This is one of the biggest risks.

If your business email uses your .com.au domain, for example name@yourbusiness.com.au, then your email relies on that domain continuing to exist and having the correct DNS records in place.

Your Google Workspace email relies on the domain’s DNS records, including MX records, to know where emails should be delivered. If the domain is cancelled, suspended or changed without the correct setup, your email can stop working.

This can result in missed enquiries, lost client communication and major disruption to day-to-day business operations.

Can a sole trader register a business name and keep a .com.au domain?

In many cases, yes.

A sole trader can register a business name in Australia, provided they have an ABN or have applied for one. This can be a practical option if a .com.au domain needs to be connected to the correct business name.

To register a business name, you will generally need a valid ABN or an ABN application reference number.

For example, if someone is operating as a sole trader and wants to keep a .com.au domain, they may be able to:

• Apply for or use their existing ABN
• Register the relevant business name under that ABN
• Make sure the domain name is connected to that business name
• Update the domain registrant details so they match the eligible entity

This can help resolve issues where a domain was previously registered under an old ABN, cancelled ABN or incorrect business details.

What is an ABN?

An ABN is an Australian Business Number. It is the unique 11-digit number used to identify a business or organisation in Australia.

Not everyone is entitled to an ABN, so it is important that the business structure and registration details are correct.

What if you cannot keep the .com.au domain?

If the business cannot meet the eligibility requirements for the .com.au domain, another option may be to move to a .com domain.

For example, instead of:

yourbusiness.com.au

the business may move to:

yourbusiness.com

A .com domain is generally easier to register because it does not have the same Australian business eligibility requirements as .com.au.

However, moving from .com.au to .com needs to be handled carefully.

You may need to update:

• Website domain settings
• DNS records
• Google Workspace email
• Email addresses
• Email signatures
• Google Business Profile
• Social media profiles
• Online directories
• Advertising campaigns
• Printed marketing material
• Client login links
• Website redirects, if the old domain is still available

If Google Workspace email is involved, this should be planned before the domain changes so email disruption can be avoided.

Why we manage domains carefully for our clients

When we manage domains for clients, we are not just registering a website address.

A domain is an important business asset. It affects your website, email, brand, search visibility, client communication and customer trust.

If a domain is not registered correctly, it can create problems later, especially when renewals, ownership checks or eligibility reviews happen.

That is why we recommend that .com.au domains are registered using the correct client business details, including a valid ABN, ACN or eligible registered business name.

Common .com.au domain issues we see

Some of the most common issues include:

• The domain was registered years ago under an old ABN
• The ABN connected to the domain has been cancelled
• The business name was never registered
• The domain is registered under a previous owner’s business
• The domain is connected to an unrelated company
• The client does not know who originally registered the domain
• The website and email are both connected to a domain that may be at risk
• The client assumes a .com.au domain works the same way as a .com domain

These issues can often be fixed, but they are much easier to resolve before the domain is cancelled, suspended or disconnected.

What should you do if your .com.au domain is at risk?

If your .com.au domain has been flagged because of an ABN, ACN or business name issue, the first step is to check who the domain is currently registered under.

You then need to confirm whether that business, company or entity is still valid and eligible.

From there, the next step is usually one of the following:

• Update the domain to the correct eligible business details
• Register the correct business name under a valid ABN
• Use a valid company ACN if the business operates through a company
• Move to a .com domain if the .com.au cannot be retained
• Carefully update the website, DNS and email records to avoid downtime



If Google Workspace email is connected to the domain, this needs to be handled carefully so email does not stop working during the process.

Final thoughts

A .com.au domain is more than just a website address. It is connected to your business identity and must meet Australian eligibility rules.

If your ABN, ACN or business name details are incorrect, cancelled or outdated, your domain may be at risk. This can affect your website, your email and your overall online presence.

At Love My Online Marketing, we help clients manage their websites, domains, DNS records and Google Workspace setup so everything stays connected and working properly.



If your .com.au domain has been flagged, cancelled, suspended or registered under the wrong ABN, we can help you work through the options and get the right solution in place.