Hartog v Colin & Shields
Hartog v Colin & Shields 3 All ER 566 is an important English contract law case regarding unilateral mistake. It holds that when it is obvious that someone has made a mistake in the terms of an offer, one may not simply "snap up" the offer and be able to enforce the agreement.
Facts
The defendants, Colin & Shields, were London hide merchants. Mr Louis-Levie Hartog was a Belgian furrier, living in Brussels. Colin & Shields discussed and verbally agreed to sell 30,000 Argentinian hare skins at “10d per skin” to Mr Hartog. When the firm made the final offer in writing it mistakenly wrote “10,000 skins at 10d per lb” and the other 20,000 lesser skins similarly per lb, not in the standard unit in the industry of per unit. As hare skins average around 5oz, this was ths of the price discussed and orally agreed upon.Mr Hartog tried to hold them to this very good written offer. He claimed loss of profit, or, in the alternative, the difference between the contract price and the market price at the time of the breach. Colin & Shields pleaded that their offer was by mistake wrongly expressed. They plead that they had still intended to offer the goods per piece, and not per pound. They argued Hartog was well aware of this mistake and fraudulently accepted an offer which he well knew that the defendants had never intended to make. In the circumstances, they denied that any binding contract was entered into, and, if there was, would counterclaim against its enforcement, for its rescission.