Labor IOUs should take effect in law, including specific reasons for arrears, specific amount of arrears, legal full names of debtors and creditors, etc. As long as the reason and amount of arrears are clearly written, the debtor's signature has legal effect. It should be noted that the behavior should be the expression of its true meaning, and the content should not violate laws, regulations or mandatory provisions, and the actor who signed the IOU should have corresponding civil capacity, otherwise it will be invalid.

Legal objectivity:

Article 143 of the Civil Code 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 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.