关于信用证的常用词组：
即期信用证：letter of credit available by draft at sight， letter of credit payable against draft at sight， letter of credit available by sight draft， letter of credit payable against sight draft， sight L/C （在商业书信中常用）；
远期信用证： usance L/C， time L/C， term L/C. 注意： 见票后多少天支付的说法很多， 常见的有： L/C available by draft at 30 days after sight 见票后30天付款； usance L/C at 30 days after sight 见票后30天付款； time L/C at 30 days after sight 见票后30天付款； term L/C at 30 days after sight 见票后30天付款； usance L/C at 30 days 见票后30天付款； time L/C at 30 days 见票后30天付款； term L/C at 30 days 见票后30天付款。
其他： confirmed L/C 保兑信用证，irrevocable L/C 不可撤消信用证，documentary L/C 跟单信用证，transferable and divisible L/C 可转让与可分割信用证，revolving L/C 循环信用证，back to back L/C 背对背信用证，reciprocal L/C 对开信用证。
另外，当数量条款定有溢短装条款时，付款条件中也应有所反映：
Payment： By confirmed， irrevocable L/C payable by draft at sight. The L/C should include a clause 5% more or less for both the quantity and the amount allowed.保兑的、不可撤销的信用证付款。信用证必须包括装货数量和总值都有5%溢短的条款。
Payment： By confirmed， irrevocable L/C， allowing 5% more or less both in amount and in quantity.保兑的、不可撤销的信用证， 数量和总值均允许5%溢短。
此外，付款条件的替代用法很多：
Payment： By confirmed， irrevocable L/C payable at sight against presentation of shipping documents in China. 保兑的、不可撤销的信用证， 凭装运单据在中国即期支付。
Payment （payment has to be made by） ： By confirmed， irrevocable L/C payable by draft at sight which should reach us at least one month before the shipping date， and should remain valid for negotiation in China until the 15th day after the date of shipment. 保兑的、不可撤销的信用证， 至迟应在装运期前一个月开达我方，在中国支付，信用证有效期至装运期后15天止。
For payment， please arrange for an irrevocable letter of credit， valid until June 30， to be opened in our favour with the ABC Bank.关于付款，请安排由ABC银行开立以我方为受益人，有效期至6月30日截止的不可撤销的信用证。
Payment should be made under an irrevocable letter of credit which is to be opened in our favour within a week after the date of your order.付款条件，在你方定货后一个星期内开立以我方为受益人的，不可撤销的信用证。
3. 价格
合同中的价格条款包括单价（price）和总值（amount）。表示单价用介词at.