采用信件、数据电文等形式订立合同的，可以在合同成立之前要求签订确认书。

采用信件、数据电文等形式订立合同的，可以在合同成立之前要求签订确认书。签订确认书时合同成立。

結果 (英文) 1:

Using data messages, letters, contracts, and may be required prior to confirmation of the contract. Signed confirmation of contract.

結果 (英文) 2:

Uses letters, electronic messages, enter into a contract, you can request to sign the contract before confirmation. When signing the contract is established confirmation.

結果 (英文) 3:

The use of letters, data messages and other forms of contract, the contract can be signed before the establishment of confirmation. The contract was established in the time of signing the confirmation.