An IOU is a written document indicating the relationship between creditor's rights and debts, which is generally written and signed by the debtor, indicating that the debtor has owed the creditor the amount indicated in the IOU. An iou refers to a bill written to the other party when borrowing personal or public cash or goods, that is, an iou. After the money and goods were returned, the IOUs were revoked or torn up.
Generally, the IOU holder only needs to simply state the borrowing facts to the judge; The holder of the IOU must state the facts of the IOU to the judge. If the other party denies it, the holder of the IOU must further prove the fact that the IOU was formed.