BIDDING
You can take a bid back, until
The Sale of Goods Act says a sale by auction is complete when the hammer falls, and until then any bidder may retract their bid.
Check your lot
WHAT THE LAW SAYS
SOLD when the hammer falls
At auction, the hammer makes the deal.
Until it falls you can take your bid back. Once it falls you have bought the lot, and if it is second-hand and the sale was open to the public in person, many of the usual shop rights do not apply.
Updated
Check your lotTHE SHORT ANSWER
Auction rules differ from shop rules.
Three things decide what you can do afterwards.
BIDDING
The Sale of Goods Act says a sale by auction is complete when the hammer falls, and until then any bidder may retract their bid.
Check your lotSECOND-HAND
For second-hand goods at a public auction that people can attend in person, you are not treated as a consumer for most of the Consumer Rights Act's goods rules.
See the numbersFEES
HMRC describes the buyer's premium as a charge to the buyer based on a percentage of the hammer price. Guidance says VAT may apply to fees too.
Before you bidGeneral information only, not financial advice. For advice on your own situation, speak to a regulated financial adviser or a free money-advice service.
A QUICK LOT CHECK
Pick the situation closest to yours. The bar shows roughly how much of the standard consumer protection for goods bought from a trader carries over.
General information on UK law, not legal advice. The auction's own conditions of sale also matter.
TWO NUMBERS WORTH KNOWING
One right that second-hand saleroom lots miss out on,
and one rule that shapes every sale.
30 days
Short-term right to reject faulty goods
Normally a consumer has until the end of 30 days to reject faulty goods bought from a trader. That right sits in the part of the Act that second-hand public auction lots are excluded from.
RIGHT TO REJECT · CRA 2015
1 lot = 1 contract
How each lot is treated
Where goods are sold by auction in lots, each lot is treated as a separate contract of sale unless shown otherwise, so a problem with one lot does not automatically undo another.
SEPARATE LOTS · SALE OF GOODS ACT
The Sale of Goods Act also says a seller may only bid, or have someone bid for them, if the sale was notified as subject to a right to bid. A sale breaking that rule may be treated as fraudulent by the buyer.
FOUR HABITS TO TRY

None of these needs expert knowledge. They come from official guidance and the rules that govern every sale by auction.
If you have never been to an auction, nidirect suggests going along to see how it works before you bid.
Look for catalogue notes such as AF (as found) or SAS (sold as seen), which may signal a fault.
They are shown at the venue or in the catalogue, and often include disclaimers about condition or authenticity.
Decide your maximum, add the buyer's premium and any VAT on fees, and stick to it.
RESERVES AND SELLER BIDS

The Sale of Goods Act lets a sale by auction be notified as subject to a reserve or upset price, so a lot may not sell if bidding stays below it.
A seller may also reserve the right to bid, but only expressly. Where that right is not notified, it is not lawful for the seller to bid or employ anyone to bid, or for the auctioneer knowingly to take such a bid.
Questions
Yes, until the sale is complete. The Sale of Goods Act 1979 says a sale by auction is complete when the auctioneer announces it by the fall of the hammer or in another customary way, and until then any bidder may retract their bid.
Often not under the Consumer Rights Act. For second-hand goods sold at a public auction that individuals can attend in person, a buyer is not treated as a consumer for most of the Act's goods rules. Check the auction's own conditions of sale.
Not under the Consumer Contracts Regulations 2013: contracts concluded at a public auction are excluded from their cancellation rights.
HMRC describes it as the amount charged to the buyer, based on an agreed percentage of the hammer price. The hammer price is the last bid accepted by the auctioneer when the hammer falls.
nidirect explains that AF means as found and SAS means sold as seen, and that either may signal a fault. Examine the item closely before bidding.
Sources
ABOUT THIS NAME
doodleauction.com is part of the DoodleSale portfolio. It isn't in an auction right now, but you can ask about leasing it.