Ergon Energy Queensland Pty Ltd v Australian Energy Regulator

This Federal Court case started as a challenge to an investigation notice, not a final trial about liability. The Australian Energy Regulator issued Ergon Energy Queensland Pty Ltd with a notice under section 206 of the National Energy Retail Law requiring information and documents. The notice said the AER was investigating possible breaches of section 273 of the National Energy Retail Law and rules 31(1), 31(2) and 31(3) of the National Energy Retail Rules.

The commercial issue behind the notice was Centrepay. Centrepay is a voluntary bill paying service operated by Services Australia for Centrelink customers. It allows customers to direct part of their social security payments to service providers such as electricity retailers. The concern raised with the AER was that Ergon had continued to receive Centrepay amounts after some customers had stopped receiving services and their accounts had been closed.

The judgment says Services Australia wrote to the AER on 3 May 2024 and reported overpayments over a ten-year period from May 2014 to February 2024. The letter said Ergon had indicated it first became aware of the overpayments in March 2021. It also said the overpayments held by Ergon exceeded $1.1 million at certain points and involved 2,061 customers. Services Australia asserted that the overpayments occurred because customers stopped using the service but did not cancel their deductions, and that under Centrepay policy and terms Ergon was obliged to monitor deductions and bring them to an end on the customer's behalf if they were no longer required.

The notice was detailed. It said the AER was investigating whether small customers of Ergon had been overcharged through Centrepay deductions and, if so, whether Ergon had complied with rule 31. Rule 31 deals with overcharging of small customers. The extract sets out that if a small customer has been overcharged by an amount equal to or above the overcharge threshold, the retailer must inform the customer within 10 business days after becoming aware of the overcharging. Depending on the circumstances, the retailer must then repay, credit or refund the amount. If the amount is below the threshold, the rule still requires a credit or refund in the circumstances described.

The notice also said the AER was investigating section 273 of the National Energy Retail Law. Section 273 requires a regulated entity to establish policies, systems and procedures to enable it to efficiently and effectively monitor compliance with the law, regulations and rules. In this case, it was common ground that the relevant requirements for section 273 were the requirements of rule 31.

The notice defined the issue in practical terms. It focused on Centrepay deductions applied to a closed account where, at the time the deduction was received, the customer did not owe any amount on that account, did not owe any amount under any other contract or account with Ergon, and did not have an active account with Ergon. In other words, the AER was not investigating ordinary billing disputes. It was looking at money received into accounts that, on the notice's description, should no longer have been receiving payments at all.

The central legal fight was about the validity of the notice, not whether Ergon had already been proved to have breached rule 31 or section 273. Ergon argued that the notice should be quashed because it was issued on an incorrect construction of rule 31.

Ergon made two main arguments. First, it said the people referred to in the Services Australia complaint were not 'customers' for the purpose of rule 31 because they were no longer customers at the time of the overpayments. On that argument, rule 31 was limited to current customers only. Secondly, Ergon said the Centrepay amounts were not incidents of 'overcharging' within the meaning of rule 31 because the payments were not made in response to an account, demand or other assertion of entitlement by Ergon, and did not involve alleged conduct by Ergon showing an intention to permanently deprive customers of the money.

The AER responded that Ergon's construction of both 'customer' and 'overcharged' was too narrow. It also said section 206 is an investigative power. On that view, the AER did not need to prove the final factual character of every payment before issuing a notice. It was enough that the AER had reason to believe Ergon could provide information and documents required for the exercise of the AER's functions, including investigating possible breaches.

The judgment also notes that section 206 is somewhat analogous, though not identical, to section 155 of the Competition and Consumer Act. That matters because courts generally recognise that information-gathering powers are designed to let regulators investigate possible contraventions before all facts are known.

Moore J dismissed Ergon's application and upheld the notice. The Court's orders were straightforward: the application was dismissed and Ergon was ordered to pay the AER's costs.

On the reasoning available, the Court rejected Ergon's argument that the relevant people fell outside rule 31 merely because they were no longer current customers when the payments were received. The Court also rejected Ergon's construction of 'overcharged'. The judgment states that circumstances falling within the scope of the notice may amount to a contravention of rule 31, and that was enough for the notice to be valid.

That point is important. The Court did not finally decide that Ergon had contravened rule 31. The judgment expressly says that whether Ergon's conduct in fact gave rise to an overcharge remained to be seen. So the case is best understood as a decision about the AER's power to investigate on the facts described in the notice, not a final ruling that the alleged conduct was unlawful.

The extract also shows part of the Court's approach to the word 'customer'. The Court did not accept a rigid reading that would always confine 'customer' to someone presently receiving energy from the retailer. The reasons refer to other provisions in the regulatory scheme, including rule 45 and rule 70, as textual indications that the concept is not always limited in that way. Even from the truncated text, the direction of the reasoning is clear: the Court was not prepared to invalidate the notice on Ergon's narrow temporal construction.

For business owners, the practical lesson is about systems, records and response speed. Many businesses receive money through recurring channels that can continue with little manual intervention. Examples include direct debits, payroll deductions, subscription renewals, instalment arrangements and government-linked payment services. If those payment channels are not tightly linked to account closure and debt reconciliation processes, money can keep arriving after the customer relationship has ended.

This case shows that a regulator may look at two things at once. First, did the business receive money in circumstances that may trigger a customer repayment, credit, refund or notification obligation? Secondly, did the business have policies, systems and procedures that were capable of detecting and managing the issue efficiently and effectively? A business that focuses only on the first question may miss the second. Even if the legal character of the payments is disputed, the regulator may still ask how the issue was identified, what controls existed, what audits were done, when management became aware, and what remediation steps followed.

It is also a reminder that saying 'the customer should have cancelled the payment' may not end the matter. If your systems can identify that an account is closed, that no debt remains, and that money is still arriving, a regulator may expect active monitoring and intervention. The exact obligation will depend on the legal regime that applies to your business, but the governance expectation is familiar across industries: automated payment channels should not become a blind spot.

The judgment gives a useful picture of the kinds of documents and conduct that can become central in a regulatory investigation. The AER relied on the Services Australia referral, the chronology of correspondence with Ergon, the wording of the notice itself, and the statutory framework that gave the AER power to investigate possible breaches. The notice then drilled into operational detail: affected customers, relevant accounts, dates, amounts, internal detection, audits, quality control activity, customer communications, refunds and cancellation steps.

That is a practical warning for businesses. When a regulator investigates a systems issue, it will often want more than a legal submission. It may want spreadsheets, account data, internal reports, audit findings, workflow records, communications with third parties, and evidence of what happened after the issue was discovered. If your business cannot produce those materials in an organised way, the compliance problem can quickly become a governance problem.

The case also shows the importance of chronology. The Court recorded that Services Australia wrote to the AER on 3 May 2024, the AER wrote to Ergon on 27 May 2024, the AER later said it would await judgment in the AGL proceedings, the AER commenced an in-depth investigation on or around 20 September 2024, and the notice was issued on 7 November 2024. That sequence mattered because Ergon argued the notice was based on a particular construction of rule 31 associated with the AGL decision. Even so, the Court upheld the notice.

If your business receives recurring payments, this case is a prompt to ask some direct operational questions. Can your finance or billing system identify payments received after an account is closed? Does the system distinguish between an account with a temporary credit and an account where no debt remains and no active service exists? Who is responsible for stopping or escalating recurring payments that continue after closure? How quickly can you notify customers and process refunds? And can you show, with records, that your compliance framework actually monitors these issues?

For regulated businesses, another trigger point is the overlap between substantive obligations and compliance framework obligations. In this case, the AER was not only investigating possible overcharging under rule 31. It was also investigating whether Ergon had established policies, systems and procedures to monitor compliance with rule 31, as required by section 273. That means a business can face scrutiny both for the underlying conduct and for the adequacy of its compliance architecture.

Finally, this case is a reminder that a challenge to a notice is not always the best place to win a broader legal argument. If the circumstances described in the notice may amount to a contravention, a court may allow the investigation to proceed and leave the final merits for another day.

The judgment is dated 27 May 2025. The Court dismissed Ergon's application and ordered Ergon to pay the AER's costs. The decision should be read as a notice-validity case. It confirms that the AER's investigation could continue on the facts described in the notice. It does not finally resolve whether Ergon in fact contravened rule 31 or section 273.

The reasons available for review are sufficient to explain the commercial story, the statutory setting, the competing arguments and the Court's conclusion on validity. Because the published text available for review is truncated, this page does not attempt a paragraph-by-paragraph reconstruction of the full construction analysis beyond what is clearly stated in the judgment text.