Legal analysis: In general, whether an electronic contract that I have not signed is valid or not depends on the actual situation. If you authorize others to adopt electronic signature technology, you can sign an electronic contract and conclude an agreement online by using the digital certificate of transaction shield issued by a third-party electronic certification body. The electronic contract has legal effect. An electronic contract without my authorization or signature is invalid.

Legal basis: Article 3 of People's Republic of China (PRC) Electronic Signature Law. In civil activities, the parties may agree to use or not use electronic signatures and data messages. 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 transfer of rights and interests of real estate such as land and houses;

(three) involving the cessation of water supply, heating, gas supply, power supply and other public utilities services;

(4) Other circumstances in which electronic documents are not applicable as stipulated by laws and administrative regulations.