The parol evidence rule is a substantive common-law rule that prevents a party to an integrated (complete) written contract from presenting extrinsic evidence that contradicts or adds to the written terms of the contract unless one of a handful of narrow exceptions applies. The rule means that one cannot use evidence of prior negotiations to alter the terms of an integrated (complete) written contract. The American Institute of Architect’s (“AIA”) proprietary software requires changes in the form agreement to be shown as redlined or strikethrough text, or as an Additions and Deletions Report appended to the end of the document. For… Read more