Parol Evidence Rule

What is Parol Evidence Rule?

A legal rule that excludes oral evidence to change or modify the existing terms of a written contract between the parties. Evidence of prior oral discussions or other extrinsic evidence to change or vary the terms of a written contract is forbidden. It is held, however, that evidence of prior oral discussions may be admissible to explain the meaning intended by the parties.

Further Reading

For more detailed information, see our related Evidence terms:

• Extrinsic Evidence
• Then Existing Mental, Emotional, or Physical Condition
• Oral Evidence
• Scintilla of Evidence Rule
• Statement Against Interest