In L/C transaction, the banker is responsible to pay money and tender documents on behalf of both parties.
信用证(L/C---lettle of credit)是一种有条件的银行付款承诺，承担第一付款责任，是一种银行信用，代替买卖双方负责付款和提交单据，对进出口双方（特别是彼此不熟悉的客户）的利益较有保障。
2
Checks serve as money, although they are not legal tender.
尽管支票不是法定货币，但可以作为货币使用。
3
And rather than costing money, they hope that the deal will ease their financial worries: whichever firm wins the tender will have to split some of its revenue with TfL.