According to Article 3 of the Electronic Signature Law, the parties may agree to use or not use electronic signatures and data messages in contracts or other documents and vouchers in civil activities.
A document in the form of electronic signature or data message agreed by the parties shall not be denied its legal effect just because it is in the form of electronic signature or data message.
The provisions of the preceding paragraph shall not apply to the following documents:
(a) involving marriage, adoption, inheritance and other personal relationships;
(two) involving the cessation of water supply, heating, gas supply and other public utilities services;
(3) Other circumstances in which electronic documents are not applicable as stipulated by laws and administrative regulations.
That is to say, electronic signature (electronic signature) can be used in all cases except the above three cases where electronic signature (electronic signature) is not applicable. For example, an enterprise's labor contract, product purchase and sale contract, supplier contract, and internal daily examination and approval can all use electronic signatures, so as to realize fast online signing and examination and approval and improve the operational efficiency of the enterprise.