In Deschamps v. Treasure State Trailer Court, Ltd. where Deschamps was sued after he bought a mobile home trailer park and then stopped making payments on it because he claimed the seller told him the water system was in good condition when in fact it required $400,000 of repairs, the supreme court of Montana held that:

Question

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The supreme court of Montana held that Deschamps had to make the full payment because his claims of reliance on verbal information were barred under the parol evidence rule, which generally prohibits the consideration of external evidence (like verbal promises) that contradicts or adds to the written terms of a contract.

In Deschamps V