This also happens when a condition has been agreed, but the evidence itself is no longer available. For example, two parties agree and enter into a contract for the rental of a house, but the house burns down in the event of an accident. If a contract is no longer enforceable, it becomes void. When a tactic such as coercion, misrepresentation or fraud is used in the creation of a contract, it becomes questionable. A contract that is cancelled cannot be turned into a valid contract by two parties who approve the treaty, because you cannot legally agree to do something illegal. However, a countervailable contract may be made effective by the unrelated party if it agrees to waive the right to terminate the contract. .