Is the iou valid only if it is signed? According to the format of IOU, your IOU is invalid only with signature and number. Regarding the format of IOUs, we should pay special attention to the following points: 1, and the format should be standardized and clear. It is suggested to use the standard format of written evidence such as IOUs and receipts. A complete IOU mainly includes four elements: creditor, debtor, debt content and return time, of course, signature and time; The receipt should include five elements: payer, consignee, reason for delivery, delivery content and delivery time. These contents are reflected in the formal written evidence (available in shops), which is clear at a glance and the rights and obligations of both parties are very clear. 2. Matters needing attention in the form. When writing written evidence, there should be no blank lines between the lines, otherwise it is easy for the holder to add other contents. Don't write with a faded pen. It is best to use black ink or blue-black ink for pens, and black ink is also acceptable. If you write notes with ballpoint pens or other easily faded ink, the handwriting will become blurred if it is not properly preserved, which may also create opportunities for people with ulterior motives to alter them with chemicals. 3. The subject matter should be clearly written. When borrowing money, paying back money, borrowing things and returning things, the amount and quantity should be clearly written, and it is best to use capital figures to prevent alteration and forgery. It's money and things. We should distinguish them, and don't be vague and confused. When it comes to numbers, you'd better use capital letters. There are lowercase but no uppercase, the case is inconsistent, there is a space in front of the number, and the decimal point position is not accurate, all of which are for the convenience of the holder to add or modify the number, thus causing disputes. For example, "the payment for goods is 180,000 RMB (1.800 million RMB)", which is a common mistake I have seen many times; Add a zero at the end of the Arabic numeral, and the amount will suddenly change dramatically. 4. The content should be clear. Sentences cannot be sloppy and the order cannot be reversed, so there is a world of difference between "borrowing Zhang San" and "borrowing Zhang San"; Don't change the "debit note" and "receipt" to each other, and the related smearing will pave the way for disputes; Don't turn "IOU" into "IOU". Some companies owe wages to migrant workers and give them "IOUs" for loans, not "IOUs" for companies that owe wages. In this way, labor disputes will instantly turn into private lending disputes, and it is difficult for migrant workers to report complaints to the labor arbitration department for long-term arrears of wages, so they can only sue in court. The writing of IOUs also needs to be standardized before it can take effect. Only a signed IOU cannot prove the amount owed, nor the time owed, let alone an IOU.

Legal objectivity:

Article 143 of the Civil Law of People's Republic of China (PRC) is valid if a civil juristic act meets the following conditions: (1) The actor has corresponding capacity for civil conduct; (2) the meaning is true; (three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs. Article 469 of the Civil Code of People's Republic of China (PRC) * * * The parties may conclude a contract in writing, orally or in other forms. Written form refers to contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the contents contained. A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.