Under the CISG, if at the time of entering into the sales contract, the buyer knew or could not have been unaware of the lack of conformity, the seller is not liable for the warranty of particular purpose, ordinary purpose, or sale by sample or model.

CISG

The United Nations Convention on Contracts for the International Sale of Goods, a treaty that sets forth the rules governing international sales contracts.

Warranty of Particular Purpose

A guarantee that a product will meet the specific requirements or needs of the buyer, going beyond general expectations.

Lack of Conformity

A situation where goods or services provided fail to meet the contractual specifications or standards agreed upon.