Disclaimers in contracts are generally included when one party wants to sell a product or service without any guarantee of its quality (merchantability) or suitability for the buyer’s intended use. Guarantees of a product’s quality or suitability are also known as warranties, and may be implied in the parties’ agreement without being written or spoken—usually by virtue of a state’s statutes adopting the Uniform Commercial Code’s provisions governing the sale of goods (Article 2)—or by court opinions (also known as common law or case law). Some states have laws (statutes) that prohibit the disclaimer of warranties; make disclaimers ineffective; and penalize parties who attempt to disclaim such warranties. Disclaimers in contracts also serve as an explicit warning to the parties of the risks in a sale or transaction and help avoid a subsequent claim that a party was unaware of such risks or was deceived regarding the presence of such risks.

In Oregon, as in many states, the regulation of disclaimers in contracts is influenced by the Uniform Commercial Code (UCC), which Oregon has adopted. Under the UCC, particularly Article 2 which governs the sale of goods, warranties can be either express or implied. Implied warranties include the warranty of merchantability and the warranty of fitness for a particular purpose. Oregon law allows for the disclaimer or modification of these warranties in certain circumstances. However, to be effective, such disclaimers must be conspicuous and specific. For example, the disclaimer of the warranty of merchantability must mention the word 'merchantability' and, in the case of a written disclaimer, it must be in a font that is large enough to be noticed by the buyer. Disclaimers of the warranty of fitness for a particular purpose must be in writing. These requirements are designed to ensure that the buyer is adequately informed about the risks and the quality of the product they are purchasing. It's important to note that while disclaimers can limit the seller's liability, they cannot be used to protect a seller from the consequences of fraud or intentional misrepresentation.