在外貿業務中，從報價到支付條件，再到催開 信用證 ，再到後來的單據結匯，涉及到很多專業 術語 。
一、支付條件（Terms of payment）
1. Our usual way of payment is by confirmed and irrevocable letter of credit available by draft at sight for the full amount of the contracted goods to be established in our favour through a bank acceptable to the sellers.
我們的一般付款方式是保兌的、不可撤銷的、以我公司為受益人的、足額 信用證 ，見票即付。 信用證 應通過為賣方認可的銀行開出。
2. For payment，we require 100% value，confirmed and irrevocable letter of credit with partial shipment and transhipment allowed clause，available by draft at sight，payable against surrendering the full set of shipping documents to the negotiating bank here.
我們要求用100%金額的、保兌的、不可撤銷的信用證，並規定允許轉船和分批裝運，憑匯票向議付行交單即期付款。
3. The letter of credit should be established with its clauses in confirmation with the terms and conditions of the contract.
信用證所開條款，必須與合約條款相符。
4. We usually accept payment by L/C at sight draft or by T/T in advance，but never by C.O.D.
通常我們接受即期信用證付款或電匯。我們從不接受貨到付款的辦法。
二、催開信用證（Pressing for L/C）
1. As the goods against your order No.111 have been ready for shipment for quite some time，it is imperative that you take immediate action to have the covering credit established as soon as possible.
由於貴方定單第111號之貨已備待運有相當長時間了，貴方必須立即行動儘快開出信用證。
2. We repeatedly requested you by fa
xes to expedite the opening of the relative letter of credit so that we might effect shipment for the above mentioned order，but after the lapse of 3 months，we have not yet received the covering L/C.
我們已經多次傳真要求貴方從速開來有關信用證，以使我們裝運上述定單之貨。但是三個月過去了，仍未收到有關信用證。
3. We hope that you will take commercial reputation into account in all seriousness and open L/C at once，otherwise you will be responsible for all the losses arising therefrom.
希望貴方認真考慮商業信譽，立即開證，否則，由此產生的'一切損失均由貴方負責。