Registering to bid at auction — NSW and Victoria

The short version

In New South Wales, bidding at a property auction is a two-step affair. Before the auction starts you register as a bidder — you give your name and address, show proof of identity, and the agent hands you a numbered paddle or card. Only registered bidders may bid. Turn up without registering and you watch from the sidelines.

Victoria does not run the same compulsory registration system for residential auctions — you can generally bid without signing on first. But the part that matters most is the same in both states: the moment the hammer falls, you've bought the property, and there's no cooling-off period to save you.

Why NSW makes you register

Registration was introduced to stamp out dummy bidding — fake bids made to push the price up. By recording everyone entitled to bid, the agent keeps a Bidders Record that shows exactly who took part. The requirement sits in the Property and Stock Agents Act 2002 (NSW) and its regulation. It's an administrative step, not a commitment to buy: registering doesn't oblige you to bid, and you can register and then sit on your hands all afternoon.

What you need to register in NSW

You register with the selling agent, usually in the half-hour before the auction or on the day. Bring:

• Proof of identity — typically a driver licence or other document showing your name and address. If the one document doesn't show your address, take a second that does.
• Your details for the Bidders Record — name and address, which the agent notes against the number you're given.

In return you get a bidder's number — the paddle or card you raise. Keep it visible; the auctioneer takes bids from registered numbers only.

Bidding for someone else, or as a couple

If you're bidding on behalf of another person — a partner who can't attend, a family member, a company or a trust — NSW generally requires you to show written authority from that buyer before you register on their behalf. A buyer's agent bidding for a client is doing exactly this. Couples buying together usually register in the name that will go on the contract; sort out whose name (or names) that is before auction day, because the person who signs is the person who's bound.

Victoria works differently

Victoria does not require buyers to register before bidding at a standard residential auction, so you can generally arrive and bid on the day. What Victoria regulates tightly is how the auction is run: under the Sale of Land Act 1962 (Vic) and estate-agent rules, the agent must make the contract and vendor statement available for inspection, and dummy bidding is banned. The safeguards sit in the conduct rules rather than a sign-in sheet. Because the rules differ, confirm the process with the selling agent for the specific auction rather than assuming it works the way it did in another state.

The rules that apply either way

Registration aside, some auction rules run across both states:

• Dummy bidding is illegal. Fake bids designed to inflate the price are prohibited, and penalties apply to agents and sellers who use them.
• Vendor bids must be announced. A seller can bid (through the auctioneer) up to the reserve, but the auctioneer has to declare each vendor bid clearly so you know it isn't a competing buyer.
• The reserve price is the lowest the seller will accept. Below it the property is "passed in"; at or above it, it's "on the market" and will sell to the highest bidder.
• Passed in. If bidding stalls below the reserve, the highest bidder is usually given first chance to negotiate a sale straight after.

Registration is the easy part — the contract binds you

It's worth being blunt: signing the Bidders Record commits you to nothing, but a winning bid commits you to everything. At auction there is no cooling-off period in either state — win, and you sign and exchange on the spot. Everything you'd normally do during cooling-off has to happen before you raise your hand: read the contract in full, line up unconditional finance, and get any inspections done. Our auction contracts guide walks through what to check in the contract itself, and the NSW cooling-off guide explains why the auction floor is the one place that protection never reaches.

What to check before you sign

1. Whether registration applies. In NSW, ask the agent when and where to register and what identification to bring, so you're not scrambling minutes before the first bid.
2. Whose name goes on the contract. Decide before the day — the registered bidder who wins is the one who signs, and changing the buyer afterwards can trigger extra duty.
3. The contract, in full. Deposit amount, settlement period, penalty interest and any special conditions — all fixed before you bid, with no cooling-off to fall back on.
4. Unconditional finance. Not a pre-approval letter — a lender's confirmed approval on this property, because a winning bid is binding immediately.
5. Written authority if you're bidding for someone else, and a firm bidding limit you've written down before the room heats up.

Common questions

Do I have to register to bid in NSW?

Yes. Only registered bidders can bid at a NSW property auction, and you register with the selling agent by giving your name and address and showing proof of identity. You'll be given a bidder's number to use.

Does registering mean I have to bid?

No. Registration simply makes you eligible to bid. You can register and choose not to bid at all — it commits you to nothing. What commits you is a winning bid, which forms a binding contract on the spot.

Can I change my mind after I win at auction?

Not freely. There's no cooling-off period at auction in NSW or Victoria, so a winning bid binds you to the contract you signed. Pulling out afterwards can cost you your deposit and more — which is why it's a private-treaty sale, not an auction, where cooling-off gives you a short exit. See our Victorian cooling-off guide for how that works.

Is there gazumping at auction?

No. Because the winning bidder signs and exchanges immediately, there's no gap for a higher offer to slip in — the opposite of a private-treaty sale. Our gazumping guide explains the difference.