Rescission cannot be adjudged for mere mistake unless the party against whom it is adjudged can be restored to substantially the same position as if the contract had not been made.
Mont. Code Ann. § 28-2-1715
When rescission may be adjudged for mistake
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.