In law, a warranty is an expressed or implied promise or assurance of some kind. The term's meaning varies across legal subjects. In property law, it refers to a covenant by the grantor of a deed. In insurance law, it refers to a promise by the purchaser of an insurance about the thing or person to be insured.

A contract is an agreement that specifies certain legally enforceable rights and obligations pertaining to two or more parties. A contract typically involves the transfer of goods, services, money, or a promise to transfer any of those at a future date, and the activities and intentions of the parties entering into a contract may be referred to as contracting. In the event of a breach of contract, the injured party may seek judicial remedies such as damages or equitable remedies such as specific performance or rescission. A binding agreement between actors in international law is known as a treaty.