在签订正式合同之前，我将发给贵方一份确认书。

Before entering into a formal contract, I will send you a confirmation.

youdao

甲方收到样品后，若对样品满意，应正式下达采购单，并签订确认书。

After Party a receives the samples, and if Party a is satisfied with the samples, Party a should formally make orders and sign the sales confirmation.

youdao