Electronic signature is not the visualization of written signature. It is actually an electronic code, through which the recipient can easily verify the identity and signature of the sender on the Internet. It can also verify whether the original text of the file has changed during transmission.

Sources of legal effect of electronic signature:

1. Electronic signature method

This Law is formulated with a view to standardizing the behavior of electronic signatures, establishing the legal effect of electronic signatures and safeguarding the legitimate rights and interests of all parties concerned.

2. Contract Law (now abolished)

Article 11 of the Contract Law stipulates: "Written form refers to contracts, letters and data messages (including telegrams, telexes, faxes, electronic data interchange and e-mails) and other forms that can tangibly express the content."

3. Civil Procedure Law

Article 63 of the Civil Procedure Law stipulates the types of evidence, including: (1) statements of the parties; ? (2) Documentary evidence; ? (3) Physical evidence; ? (4) Audio-visual materials; ? (5) Electronic data; ? (6) Testimony of witnesses; ? (7) Appraisal opinions; ? (8) Records of the inquest. ? Evidence must be verified before it can be used as a basis for ascertaining facts.

In fact, what we should pay more attention to is: how to determine the legal effect of electronic signature?