main purpose rule
- An element of contract law stating that a commitment to pay another person's debt does not have to be written down for it to be valid, especially if the person making this promise is aiming for personal gain or benefit
- The court applied the main purpose rule to validate the oral agreement that the defendant would pay the plaintiff's debt.
- Through the main purpose rule, the engagement remained binding even though there was no written document supporting the lender's pledge to cover the debtor's loan.
- The main purpose rule made the verbal promise enforceable because the promisor was aiming to benefit from satisfying the debt of the other party.