Hello, in principle, the contract signed online is invalid. In order to take effect, the inbox and outbox of both parties' contracts must be clearly stipulated in the contract. This is the first one. It is also clear in the contract that this contract is concluded in the form of data message. I suggest that you sign a confirmation letter by fax after the contract signed online is completed. Of course, the details of your online signing contract, inbox and outbox should be involved. Then the other party stamps and returns the copy. Of course, the fax should also indicate that the fax and its copy have legal effect. It is most effective if you have the opportunity to put a red stamp on each other. Yeah!