A legally binding written contract can be expressed in the form of contract, letter, telegram, telex, fax, electronic data exchange and e-mail. As can be seen from this article, the form of the contract includes fax. If the parties reach an agreement by fax, and the contents meet the requirements of the contract, the contract is established when the fax of the promised contents reaches the other party. The faxed contract text also has the ability to prove the establishment of the contract. However, in practice, the fax contract may often be illegible in the transmission process, which is easy to be forged and tampered with, and its effectiveness has always been controversial. In order to prove the validity of the fax contract, it is necessary to provide corresponding evidence, such as the fax telephone records of the telecommunications company.

Legal basis:

Article 469 The parties may conclude a contract in writing, orally or in other forms.

Written form refers to contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the contents contained.

A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.