An auctioneer has authority from a bidder at the auction, as well as from the seller, to bind both by a memorandum of the contract, as prescribed in the Title on Sale.
Cal. Civ. Code § 2363
Auctioneers
Enacted 1872.
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.