Before you can raise a hand at a Sydney auction, you have to be on the list. Bidder registration is a legal requirement in NSW, not an agency formality, and turning up without the right paperwork is one of the quietest ways to lose a property you were ready to fight for. It only takes a few minutes, but it has to be done before the auctioneer calls for the first bid - and a surprising number of buyers leave it to the footpath and get caught out.
Why registration is compulsory in NSW
Under the Property and Stock Agents Act, anyone who wants to bid at a residential or rural property auction in New South Wales must register with the agent first and be issued a bidder number. The rule exists to stamp out dummy bidding: every genuine bid can be traced to an identified person, and the auctioneer can only accept bids from registered numbers plus any clearly announced vendor bid. If you're not registered, you legally cannot bid - it's that simple.
What to bring to register
Have these ready before you arrive
- Proof of identity showing your name and address - a driver licence is the simplest, or a passport plus a separate document confirming your address
- The details of anyone you're buying with, since each bidder on the contract typically needs to register
- Your solicitor or conveyancer's details, useful to have on hand even though they're not required to register
- A pen and a few minutes of buffer, because the table gets busy in the final ten minutes before a popular auction
- Your finance and deposit sorted separately - registration confirms who you are, not that you can pay
How the registration process works on the day
You'll usually find a registration table set up near the entrance or on the footpath outside the property, staffed by someone from the selling agency. You hand over your ID, the agent records your name and address in the bidder record, and you're given a numbered card - that number is how the auctioneer identifies your bids. Many Sydney agencies now let you register online in advance through the campaign listing, which saves queuing on the day, but you'll still need to confirm your identity in person before bidding. Register early enough that you're settled and watching the crowd before the auctioneer's opening statement, not still filling in a form.
Not sure your paperwork is in order before Saturday?
Talk to a Sydney buyers agentRegistering to bid for someone else
If you're bidding on behalf of another person - a partner who can't attend, a family member buying interstate, or a company - you generally need written authority from that buyer to register in their name, and the agent will ask to see it. A buyers agent bidding for a client registers the same way, carrying signed authority to act within an agreed limit. This matters because the person named in the bidder record is the person the contract binds, so getting the name right at the registration table isn't a formality you can fix later.
Common registration mistakes
The slip-ups that catch buyers out
- Arriving minutes before the auction and joining a queue that outlasts the opening bid
- Bringing ID that proves identity but not address, leaving the agent unable to complete the record
- Assuming a co-buyer doesn't need to register, then finding only one of you can legally bid
- Registering under the wrong name for a company or trust purchase, which complicates the contract
- Forgetting your bidder number in the heat of bidding, so a raised hand goes unrecognised
Tip: photograph both sides of your bidder card the moment you're registered. If nerves scatter your paperwork mid-auction, your number is still on your phone and you can keep bidding without breaking stride.
What registration does and doesn't do
Registering confirms your identity and your right to bid - it doesn't commit you to anything. You can register and then choose not to bid at all, or bid once and stop; there's no obligation attached to holding a number. What it also doesn't do is check your finances, so being registered is not the same as being ready to buy. That readiness - contract reviewed, inspections done, finance approved to your ceiling, deposit on hand - has to be sorted well before you reach the registration table, because the moment the hammer falls the sale is unconditional.
Where a buyers agent fits in
For buyers who are interstate, overseas, or simply unnerved by the crowd, a buyers agent handles registration and bidding on their behalf, arriving with the authority and identification already in order. Beyond the paperwork, they've registered at hundreds of Sydney auctions and know each agency's quirks - which ones insist on advance online registration, which run a relaxed footpath table, and how much lead time a particular auctioneer expects. That familiarity turns a rushed, error-prone few minutes into a non-event.