In contract law, a warranty has various meanings but generally means a guarantee or promise which provides by one party to the other party that specific facts or conditions are true or will happen. This factual guarantee may be enforced regardless of materiality which allows for a legal remedy if that promise is not true or followed.
Although a warranty is in its simplest form an element of a contract, some warranties run with a product so that a manufacturer makes the warranty to a consumer with which the manufacturer has no direct contractual relationship.
A warranty may be express or implied, depending on whether the warranty is explicitly provided (typically written) and the jurisdiction. Warranties may also state that a particular fact is true at one point in time or that the fact will be continue into the future (a "promissory" or continuing warranty).
Warranties provided in the sale of goods (tangible products) vary according to jurisdiction, but commonly new goods are sold with implied warranty that the goods are as advertised. Used products, however, may be sold "as is" with no warranties.
In the United States, various laws apply, including provisions in the Uniform Commercial Code which provide for implied warranties. However, these implied warranties were often limited by disclaimers. In 1975 the Magnuson–Moss Warranty Act was passed to strengthen warranties on consumer goods. Among other things, under the law implied warranties cannot be disclaimed if an express warranty is offered, and attorney fees may be recovered. In some states statutory warranties are required on new home construction, and "lemon laws" apply to motor vehicles.
Implied warranties are unwritten promises that arise from the nature of the transaction, and the inherent understanding by the buyer, rather than from the express representations of the seller. In the United States, Article 2 of the Uniform Commercial Code (which has been adopted with variations in each state) provides that the following two warranties are implied unless they are explicitly disclaimed (such as an "as is" statement):