When Can Parol Evidence in Contracts?

Parol evidence is admissible to clarify ambiguous terms, to prove fraud, duress, or mistake, and to show subsequent modifications or agreements that were not included in the final written contract.

Parol evidence refers to any oral or written statements that are not included in the written contract but relate to the agreement between the parties. Under the Parol Evidence Rule, extrinsic evidence may not be admitted to contradict or vary the terms of a written contract deemed to be complete and final. However, there are important exceptions.

First, parol evidence can be used to interpret ambiguous terms within a contract. If contractual language is unclear, courts may consider prior negotiations, conversations, or the conduct of the parties to ascertain their intended meaning. This principle highlights the intent of the parties and provides context that may not be evident in the written document alone.

Secondly, parol evidence may be admitted to establish claims of fraud, duress, or mistake. For example, if a party claims that they were induced to enter a contract based on false representations, they can present evidence outside the contract to support this claim. Similarly, if there was a mutual mistake regarding a fundamental fact, this evidence may help invalidate the contract.

Additionally, parol evidence is permissible to demonstrate subsequent modifications and agreements. If the parties have agreed to alterations post-signing or additional terms that were not included in the final contract, such evidence can be presented illustrating these changes, provided that the written contract does not include a clause barring modifications.

Finally, the integration clause within a contract plays a crucial role in determining the admissibility of parol evidence. If a contract includes a merger or integration clause asserting that it is the complete and exclusive agreement, the ability to introduce parol evidence is substantially limited, except under the aforementioned exceptions.

• 1Haines v. St. John (1891) - established the exceptions for ambiguity in contract interpretation.
• 2Mansui v. Huber (1997) - reinstated that parol evidence could be used to prove allegations of fraud.
• 3Nanakuli Paving & Rock Co. v. Shell Oil Co. (1981) - affirmed the use of industry practice in interpreting ambiguous terms.
• 4U.C.C. § 2-202 - highlights the limitations on parol evidence in commercial contracts.
• 5Eastern Energy Corp. v. City of New York (2005) - reiterated that subsequent modifications can be proven with parol evidence.

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