Under the hammer: Understanding auction authority, bidders and compliance in Queensland

Property auctions remain a cornerstone of the Queensland real estate market. For sellers, auctions can deliver speed and competitive tension, which may lead to greater sales prices. For buyers, they offer transparency and an opportunity to purchase on an equal footing with other bidders. 

Behind every successful auction, however, is a tightly regulated framework governing who may conduct an auction, who may bid, and how the process must be documented. For agents and auctioneers, understanding these obligations is essential to ensuring both compliance and confidence on auction day.

The legislative framework

In Queensland, the conduct of property auctions is regulated under the Property Occupations Act 2014 (Qld) (the Act) and supporting regulations. The legislation applies to property agents, resident letting agents, auctioneers and their employees, and is designed to protect consumers.

Authority to conduct an auction

Both auctioneers and real estate agents fall within the definition of property agents under the Act ^[1]. 

An “auctioneer” is specifically defined as a person who holds an auctioneer licence. An auctioneer licence is separate and distinct to that of a real estate agent licence, and it authorises the auctioneer, in the course of business, or as an employee, to:^[2] 

1. sell or attempt to sell or offer for sale or resale of any real property, or an interest in real property, by way of auction as an agent for others for reward; and

2. sell the property or interest by any means during the auction period.

Before any auctioneer services can be performed, a property agent must be properly appointed in writing.^[3] This is done by way of a compliant Form 6 Appointment (for residential sales) or a Form 6A Appointment (for commercial sales).  

Where an agency is appointed to sell a property by auction, the appointment authorises the agency’s employed auctioneers to conduct the auction. If an external auctioneer is engaged, the auctioneer’s engagement must be formalised, and a written copy must be given to each client. ^[4]

The Act stipulates that the day set for sale by auction is to be in writing, in the Form 6 Appointment.^[5]

Auction day

The auction day carries its own unique legal framework. Before bidding begins, the auctioneer must ensure that:

• their name is displayed prominently at the auction site, and/or that they otherwise announce their name;
• they must display and announce the conditions of the auction, including: 

- the auction process; 

- the deposit payable under the terms of the auction contract;

- all other pertinent terms of the contract of sale; and 

- any other information material to potential bidders.^[6]

At the fall of the hammer, a binding contract is formed.^[7] At that point, the auctioneer has authority to sign the contract of sale, on behalf of the seller and the successful bidder. This authority arises automatically from the auction process and cannot be withdrawn by either party once the hammer has fallen.^[8]

However, that authority is limited in time. It extends only so far as is reasonably connected with completing the sale arising from the auction, ^[9] and does not continue indefinitely after the auction day. ^[10]

Who can bid at an auction in Queensland?

In Queensland, any person who intends to bid at an auction must be registered before they are permitted to bid. For each auction, the auctioneer must: 

• record the details of every registered bidder; 
• inform persons considering bidding in the auction that only bids from registered bidders will be accepted; and
• issue each bidder with a unique bidder number, if satisfied of the person’s identity.^[11]

An auctioneer must not accept a bid from a person unless they are registered and have been issued a bidder number for that auction. ^[12]

A registered bidder may bid on behalf of another person. However, where a bidder intends to bid on behalf of someone else, prior to bidding commencing, the bidder must:

• provide the details of the person who is the prospective buyer; 
• their own details as the registered bidder; 
• disclose whether they are a buyer’s agent; and
• provide appropriate written authority (such as a letter of authority or power of attorney). ^[13]

Consequences of non-compliance

Failure to comply with bidder registration and record-keeping obligations can result in serious consequences for auctioneers including monetary penalties, disciplinary action, suspension or cancellation of the auctioneers’ licence, and regulatory enforcement action.^[14]

A situation occasionally encountered in practice is where a successful bidder later advises – after the fall of the hammer – that they were bidding on behalf of another person. 

In Queensland, non-disclosure by a bidder that they are not the prospective buyer does not automatically invalidate the sale. ^[15] The contract may still proceed in the name of the undisclosed person.

While a bid accepted in breach of registration requirements can be treated as binding between the buyer and seller, this does not shield the auctioneer from regulatory consequences. ^[16] If the bidder’s representative’s capacity was disclosed but not recorded at registration, the auctioneer may also be exposed to regulatory action for failing to comply with bidder record requirements.

Conclusion 

Property auctions in Queensland offer efficiency and transparency, but they demand strict compliance with legislative requirements. For agents and auctioneers, understanding bidder rules and authority limits is just as important as achieving a strong sale result.

To minimise risk, auctioneers and agents should adopt consistent auction-day procedures, including: 

• requiring all bidders to register;
• asking each bidder whether they are bidding for themselves or on behalf of another person;
• obtaining written authority where required; and
• ensuring the Bidder Record is complete before the auction commences and the first bid is accepted. 

 

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References:

[1] Property Occupations Act 2014 (Qld), s 15.
[2] Property Occupations Act 2014 (Qld), ss 14 and 25.
[3] Property Occupations Act 2014 (Qld), ss 102 and 109.
[4] Property Occupations Act 2014 (Qld), ss 102 and 113(2).
[5] Property Occupations Act 2014 (Qld), s 107.
[6] Property Occupations Regulation 2014 (Qld), s 9; Queensland Government, ‘Buying property at auction’ (Web Page, 25 February 2026) https://www.qld.gov.au/law/housing-and-neighbours/buying-and-selling-a-property/buying-a-home/ways-to-buy-your-home/buying-at-auction.
[7] Property Occupations Act 2014 (Qld), s 160.
[8] Bells v Balls [1897] 1 Ch 663.
[9] Bell v Balls [1897] 1 Ch 663; [1895-99] All ER Rep 733 per Stirling J; Chaney v Maclow [1929] 1 Ch 461 per Lawrence LJ, CA (no definite period so long as it forms part of the transaction of the auction sale); Phillips v Butler [1945] Ch 358; [1945] 2 All ER 258; Wright v Madden [1992] 1 Qd R 343, SC(Qld), Full Court.
[10] Mews v Carr (1856) 1 H & N 484; 156 ER 1292; Bell v Balls [1897] 1 Ch 663; [1895-99] All ER Rep 733 (no authority for signature a week after a sale where defendant repudiated the bid at the time); Phillips v Butler [1945] Ch 358; [1945] 2 All ER 258 per Romer J; Ecroyd v Davis (1872) 3 VR (L) 228, SC(VIC), Full Court (not six months after the auction); Wright v Madden [1992] 1 Qd R 343 at 346-7 per Williams J (Dowsett and Ryan JJ agreeing), SC(Qld), Full Court.
[11] Property Occupations Regulation 2014 (Qld), s 11.
[12] Property Occupations Regulation 2014 (Qld), s 23(2)(b).
[13] Real Estate Institute of Queensland, ‘Best Practice Guidelines’ (Web Page, 25 February 2026) https://www.reiq.com/resources/reiq-best-practice-guidelines.
[14] Queensland Government, ‘About the Office of Fair Trading's enforcement processes’ (Web Page, 25 February 2026) https://www.qld.gov.au/law/laws-regulated-industries-and-accountability/queensland-laws-and-regulations/regulated-industries-and-licensing/fair-trading-enforcement/about#:~:text=The%20Office%20of%20Fair%20Trading%27s%20(OFT)%20goal%20is%20to%20protect,of%20the%20laws%20we%20administer.
[15] See HZD Pty Ltd v McInnes (2007) ANZ ConvR 592.
[16] Ibid [37].