Cecily Zamora
The parol evidence rule is a rule in common law jurisdictions that limits the kinds of evidence parties to a contract dispute can introduce when trying to determine the specific terms of a contract. The rule bars extrinsic evidence of a prior or contemporaneous agreement and prevents parties to a written contract from presenting extrinsic evidence of terms in a contract that contradict, modify, or vary the terms of a written agreement. The rule applies to evidence that relates to a contract but is not contained in the body of the contract, such as other written agreements, written promises, oral agreements, and discussions prior to finalizing the written contract. There are exceptions to the rule, including partially integrated contracts, agreements with separate consideration, and resolving ambiguities.
| Characteristics | Values |
|---|---|
| Definition | A rule in common law jurisdictions that limits the kinds of evidence parties to a contract dispute can introduce when trying to determine the specific terms of a contract. |
| Application | Applies to evidence that relates to a contract but is not contained in the body of the contract. |
| Evidence Covered | Other written agreements, written promises, oral agreements, and discussions prior to finalizing the written contract. |
| Contract Status | Applies only when a contract is completely finalized or "integrated." |
| Exceptions | Collateral contract exception, ambiguity exception, partial integration |
| Effect | Bars extrinsic evidence of a prior or contemporaneous agreement. |
| Court Rulings | In Baker v. Bailey, the court refused to admit parol evidence and enforce an extrinsic agreement as it contradicted the original written contract. |
| Court Rulings | In Kerl v. Smith, the Mississippi Supreme Court allowed the plaintiff to introduce parol evidence to show the meaning which the parties attached to words in their contract. |
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What You'll Learn
The rule and its exceptions
The parol evidence rule is a rule in common law jurisdictions that limits the kinds of evidence parties to a contract dispute can introduce when trying to determine the specific terms of a contract. It bars extrinsic evidence of a prior or contemporaneous agreement, such as oral discussions or written correspondence that do not form a separate contract. In other words, once parties to a contract have signed and agreed to the terms, they cannot submit prior oral or written statements that modify or contradict the terms or clauses in the contract.
The rule applies only when a contract is completely finalised, or "integrated". This means an unambiguous execution of the written agreement, indicating that the parties intended it to be the final contract.
There are exceptions to the parol evidence rule, including:
- Partially integrated contracts: If a contract is only partially integrated, the court may look at preliminary evidence to determine the extent of the integration.
- Collateral contract exception: This applies when there is a separate agreement made in addition to the original written agreement, as long as it does not contradict the express or implied provisions of the original contract.
- Ambiguity exception: If the language in the original written contract is susceptible to more than one meaning, the court may admit parol evidence to determine the meaning of the contract language.
- Resolving ambiguities: Parol evidence may be admitted to clarify ambiguous terms in a contract, such as the meaning of a specific word or phrase.
- Contract defences: Parol evidence may be used to establish contract defences, such as misrepresentation or violation of consumer protection laws.
- Consistent additional terms: Parol evidence may be used to explain or supplement the contract with consistent additional terms, unless the court finds that the written contract was intended as a complete and exclusive statement of the terms.
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Integration and finalisation
Integration is a key concept in the parol evidence rule. A contract is considered integrated when it is a complete and exclusive statement of the terms of the agreement. This means that the contract captures the full agreement between the parties and is intended to be the final contract. The determination of whether a contract is integrated is made by courts, which consider the circumstances surrounding the contract's creation and the language used within it.
The presence of an integration clause in a contract is a strong indicator that it is intended to be a final and complete agreement. An integration clause typically states that the written contract contains the final and complete agreement between the parties and that they do not intend to be bound by any additional terms not included in the contract.
The parol evidence rule applies only to integrated contracts. Once a contract is integrated, the parol evidence rule bars the introduction of extrinsic evidence, such as prior oral or written statements, that contradict or modify the terms of the integrated contract. This rule gives primacy to the written contract and aims to prevent the consideration of contradictory information.
However, there are exceptions to the parol evidence rule. Extrinsic evidence may be admitted in cases of ambiguity, where the language of the contract is susceptible to multiple interpretations. In such cases, courts may consider the rules of statutory construction and look at credible extrinsic evidence to determine the parties' true intentions. Additionally, extrinsic evidence may be allowed to clarify terms in a contract that are missing or ambiguous, as in the case of Kerl v. Smith, where the court allowed the introduction of a prior written agreement to define the term "merchantable pine timber".
Another exception is the collateral contract exception, where a separate agreement exists alongside the integrated contract, provided it does not contradict the express or implied provisions of the integrated contract.
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Ambiguity and collateral agreements
The parol evidence rule is a contract law doctrine that prevents the introduction of evidence to prove oral agreements that were not put into the written agreement between the parties. This rule applies to statements made orally and to other extrinsic evidence, such as written correspondence that does not form a separate contract.
The parol evidence rule can be simplified as "the outside evidence rule," where outside evidence cannot be used where there is a written contract. However, there are exceptions to this rule, and in those jurisdictions, extrinsic evidence may be admitted for various purposes. This is called the Admission Rule.
The parol evidence rule applies only when a contract is completely integrated or finalized. This means an unambiguous execution of the written agreement that leaves no doubt that the parties intended it to be the final contract.
There are two exceptions to the parol evidence rule: the collateral contract exception and the ambiguity exception. For the collateral contract exception, the court will look at preliminary evidence to determine if the contract was partially integrated. There are three conditions that must be met for the collateral contract exception to apply:
- The extrinsic agreement must, in form, be a collateral one. This means that the extrinsic agreement must not be distinct and independent from the original written agreement.
- The same consideration for the original agreement must apply to the extrinsic agreement.
- The extrinsic agreement must not contradict the express or implied provisions of the written contract.
The collateral contract exception allows for the introduction of evidence of collateral agreements. This means that an independent collateral agreement exists side-by-side with a completely integrated and finalized written agreement. This is only allowed if the collateral agreement does not contradict the written and finalized contract and does not contain terms that would normally be included in the present agreement.
The ambiguity exception allows for the introduction of parol evidence to clarify terms in a contract when a term's meaning is missing or ambiguous. For example, in Kerl v. Smith, the Mississippi Supreme Court allowed the plaintiff to introduce parol evidence to show the meaning which the parties themselves attached to the word "timber" in their written contract. The court allowed the plaintiff to introduce evidence of a prior written agreement the parties had when defining timber as "merchantable pine timber."
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Extrinsic evidence
The parol evidence rule is a rule in common law that limits the kinds of extrinsic evidence parties to a contract dispute can introduce when trying to determine the specific terms of a contract. Extrinsic evidence refers to evidence that is outside of the body of the contract, such as other written agreements, written promises, oral agreements, and discussions prior to finalizing the written contract.
The parol evidence rule applies only when a contract is completely finalized or "integrated". This means an unambiguous execution of the written agreement that leaves no doubt that the parties intended it to be the final contract. A complete integration captures the parties' full and exclusive agreement on a contract matter.
There are exceptions to the parol evidence rule where outside evidence is allowed to achieve certain goals that are distinct from the content of the agreement. The first case in which extrinsic evidence is allowed is to clarify terms in a contract when a term's meaning is missing or ambiguous. For example, in Kerl v. Smith, the Mississippi Supreme Court allowed the plaintiff to introduce evidence of a prior written agreement to explain the meaning of the word "timber" in the current contract. The second case in which extrinsic evidence is allowed is to demonstrate evidence of collateral agreements, where an independent collateral agreement exists side-by-side with a completely integrated and finalized written agreement. This is only allowed if the collateral agreement does not contradict the written and finalized contract.
The court will also apply the "ordinary or natural test", which asks whether the extrinsic agreement is the sort of promise that one might reasonably expect to be in the original written contract. For example, in Baker v. Bailey, the court refused to admit the parol evidence and enforce the extrinsic agreement because the court found that the original written contract was clear and the extrinsic agreement could be reasonably expected to be included in the original written contract.
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Contract disputes and jurisdiction
The parol evidence rule is a rule in common law jurisdictions that limits the kinds of evidence parties to a contract dispute can introduce when trying to determine the specific terms of a contract. It precludes parties who have reduced their agreement to a final written document from later introducing other evidence, such as the content of oral discussions from earlier in the negotiation process, as evidence of a different intention regarding the terms of the contract. The rule provides that "extrinsic evidence is inadmissible to vary a written contract".
The rule applies to statements made orally and to other extrinsic evidence (such as written correspondence that does not form a separate contract) regarding a contract. If a contract is in writing and final (integrated), parol or extrinsic evidence will generally be excluded. However, there are a number of exceptions to this general rule. These include partially integrated contracts, agreements with separate consideration, and the need to resolve ambiguities or establish contract defences.
The precise extent of the rule varies from jurisdiction to jurisdiction. As a preliminary or threshold issue, the court may first determine if the agreement was, in fact, totally reduced to a written document or "integrated". Beyond that, the exceptions to the parol evidence rule vary between jurisdictions. For example, in the New South Wales case of Saleh v Romanous, it was held that equitable estoppel triumphs over common law rules of parol evidence.
In Baker v. Bailey, the court refused to admit the parol evidence and enforce the extrinsic agreement because the original written contract was clear and definite, and the extrinsic agreement contradicted it. The court will apply the "ordinary or natural test", which asks whether the extrinsic agreement is the sort of promise that one might reasonably expect to be in the original written contract.
There are two exceptions to the parol evidence rule: the collateral contract exception and the ambiguity exception. For the collateral contract exception, the court will look at preliminary evidence to determine if the contract was partially integrated. There are three conditions that must be met for the collateral contract exception to apply: the extrinsic agreement must be collateral in form, it must not contradict the express or implied provisions of the written contract, and the same consideration for the original agreement must apply to the extrinsic agreement.
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Frequently asked questions
Parol evidence is a rule in contract law that bars parties to a written contract from presenting "extrinsic" evidence of terms that contradict, modify, or vary the terms of a written agreement.
Extrinsic evidence refers to any outside evidence that is not included in the body of the contract, such as oral agreements or discussions prior to finalizing the written contract.
The parol evidence rule ensures that once parties to a contract have signed and agreed to the terms, they cannot later introduce evidence of prior oral or written statements that modify or contradict the terms of the contract.
Yes, there are a few exceptions. These include partially integrated contracts, collateral agreements, and the need to resolve ambiguities or establish contract defenses.
The court will consider the circumstances to determine whether the parties intended the written agreement to be a final and complete agreement. If the contract appears to be complete and specific, it is likely to be considered fully integrated.
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