The signature should be standardized. Mark the date. Since many written documents do not have the date, once a dispute occurs, it is difficult to ascertain the truth, which will cause difficulties in determining the statute of limitations, and may even lead to the loss of the right to sue; seals must be standardized, and some written documents are ghostwritten or ghostwritten by others. For the signature, I only put one fingerprint on it, which makes it difficult to determine the responsible facts in the event of a dispute; the name must be complete, and it is forbidden to have a surname without a name or a name without a surname. Some documents have a surname but no name, or a name but no surname. Over time, disputes often arise due to the other party's default.

In addition, the IOU must be claimed after the debt is paid off. When some people repay someone else's debt, the other party claims that they can't find the IOU at the moment, so they trust the other party, but don't know that they are asked to write a receipt to keep. Later, the other party takes out the original IOU to demand payment, causing disputes.