an electronic signature needs to meet certain conditions before it can become a reliable electronic signature. According to Article 13 of the Electronic Signature Law, an electronic signature is regarded as reliable if it meets the following conditions:

1) When the electronic signature production data is used for electronic signature, it belongs to the electronic signer exclusively;

2) When signing, the electronic signature production data is only controlled by the electronic signer;

3) Any changes to the electronic signature after signing can be found;

4) Any changes to the content and form of the data message after signing can be found.

how to sign an electronic contract

1. electronic contracts must be signed through a third-party signing platform;

2. The electronic contract must be signed with a digital certificate (reliable electronic signature) provided by a legal CA;

3. The basic condition of reliable electronic signing technology is that the certificate used for signing electronic contracts must be issued by a certificate authority trusted by Adobe, which ensures that the signed PDF file shows "signature credibility" in Adobe reader, and the validity of the contract is automatically verified by Adobe reader, which is universal.