Mistake (contract law) void. Traditionally, Caveat Emptor (let the buyer beware), and under Common Law Caveat Venditor (let the seller beware). A contract might be voidable from unilateral mistake for any of the following: A mutual mistake occurs when the parties to a contract are both mistaken about the same "material" fact within their contract. They are at cross-purposes. There is a meeting of the minds, but the parties are mistaken. Hence the contract is voidable. "Collateral" mistakes will not afford the right of rescission. A collateral mistake is one that 'does not go to the heart' of the contract. For a mutual
Caveat emptor goods that do not meet legal standards of acceptance. Consumer purchases are regulated by the Consumer Rights Act 2015, whilst business-to-business purchases are regulated by the Sale of Goods Act 1979. In the UK, consumers have the right to a full refund for faulty goods. However, traditionally, many retailers allow customers to return goods within a specified period (typically two weeks to two months) for a full refund or an exchange, even if there is no fault with the product. Exceptions may apply for goods sold as damaged or to clear. Goods bought through "distance selling," for example online or