As a written contract, the electronic contract should be used as evidence, and the validity of the contract should be judged first. Electronic contracts need to meet the requirements for the effective establishment of contracts. According to the provisions of China's contract law, the effective establishment of a contract must meet the following conditions: (1) The parties to the contract are legal, that is, the parties to the electronic contract have corresponding civil capacity; (2) the intention of the parties to the contract is true, that is, the parties to the electronic contract truly express their inner meaning of validity, which is consistent with the performance; (3) The contents of the contract are legal, that is, the contents of the electronic contract do not violate laws and regulations or public interests; (4) The object of the contract is clear and possible, that is, the contents of the offer and acceptance of the electronic contract need to be clear and executable.
In addition, as a special form of written contract, the electronic contract signed online also needs to meet other requirements, that is, the reliability of electronic signature. Article 13 of China's Electronic Signature Law stipulates that "an electronic signature shall be regarded as a reliable electronic signature if it meets the following conditions at the same time: (1) when the electronic signature production data is used for electronic signature, it belongs exclusively to the electronic signatory; (2) When signing, the electronic signature production data is only controlled by the electronic signer; (3) Any changes to the electronic signature after signature can be found; (4) Any changes to the content and form of the data message after signing can be found. " According to the laws of our country, all electronic signatures that meet the above four conditions can be regarded as reliable and have the same effect as handwritten signatures.