In relation to an auction, an offer for property, the bidder being the offeror: AGC (Advances) Ltd v McWhirter (1977) 1 BPR 9454. In an auction, the sale is complete when the auctioneer announces its completion by the fall of the hammer, or any other customary manner: Sale of Goods Ordinance (Cap 26) s 60. Until such announcement is made, any bidder may retract his bid. Normally, the bidder is the offeror and a bid may be withdrawn before acceptance such as the falling of the hammer: Payne v Cave (1789) 3 Temp Rep 148; 100 ER 502. The onus is on the bidder to make an effective bid, being one communicated to the auctioneer: Richards v Phillips [1968] 2 All ER 859, [1969] 1 Ch 39 (CA). When a bid is accepted by an auctioneer, the offer is converted into an oral contract for sale between the seller and the bidder: Phillips v Butler [1945] Ch 358. See also Acceptance; Auction; Auctioneer; Contract; Fictitious bid; Knock down; Offer.
在拍賣會上，當拍賣商憑下鎚或其他慣用方式宣布拍賣成交時，買賣即告完成：《貨品售賣條例》（第26章）第60條。在拍賣商未宣佈拍賣成交前，任何競投人均可取消其競投。競投人通常就是要約人，而競投可以在受約（例如下鎚）前予以撤回：Payne v Cave (1789) 3 Temp Rep 148; 100 ER 502。競投人有責任作出有效的競投，即己通知拍賣商：Richards v Philips [1969] 1 Ch 39（英國上訴法院）。如有關的競投獲拍賣商承約，則競投人的要約變成賣方與競投人之間的口頭買賣合約：Philips b Butler [1945] Ch 358。另見 Acceptance; Auction; Auctioneer; Contract; Fictitious bid; Knock down; Offer。n.

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