即期信用证是?

on irrevocable L/C at sight,

Subject:Your first Order No.JS502 was pleased to receive your July 24 Fax to Order NO.JS502.In recent years we have been the letter of credit to the spot to do business with you.However,taking into account the better your credit situation,we agree to your acceptance of the 30-day period to pay a single payment to pay.
In this way will help you handle the process faster and more effectively the issue of your Order,we believe that in the long-term operation can also save you considerable costs.However,when the contract amount of more than 4000 U.S.dollars,have opened a view to the letter of credit immediately.Cooperation to maintain a pleasant look.

With the amount of the invoice out in our favor an irrevocable letter of credit at sight

1.向出口商索赔,是出口商货物的质量问题.
2.向承运人索赔,承运人已签发清洁提单,那么他就必须将与提单商一致的货交给进口商.在这里要说到保险,出口商投保了一切险及战争险,在一切险里覆盖短量险,但是短量险是心须由外包装破裂或散装货物发生数量散失和实际重量短缺的损失保险公司才予以赔偿,这里不能找保险公司.
3.向出口商索赔.货物外表情况良好,而箱内货物却短少,说明装船前货物就已经短少,责任在于出口方.
希望可以帮到你.

Date of Delivery: Deliver within 25 days upon receipt of instant L/C from our sIde.
Condition of payment: Paid thru New York Branch of China Bank on 100% of irrevocable instant L/C.
We will mail you sales confirmation in duplicate. Upon receipt, please sign one back as soon as possible.

2 If you can agree to pay it by sight credit, we can make the deal.
3 As for the long-run friendship between us, that it is paid by D/P 60 is acceptable just for this time.
4.This deal is made by Letter of Credit in 30 days.
5.As Request for Quotation on September 20,We are glad to offer the new quotation as follows:

Our company requires all business must pay by L/C at sight from now on.
FYI

The 30% of the invoice amount will be paid by T/T as downpayment,the other 60% be paid by noncanceable demand L/C.

In in terms of payment,we usually only accept irrevocable documentary letter of credit at sight,considering both friendly relationship we are ready to make an exception and accept 60 days sight payment by l/c hope you accept our proposal and speed afte

13．在来料加工和补偿贸易中常使用（①循环信用证 ）。

信用证是一种付款承诺,只要单据符合要求,中国银行作为开证行就必须付款.
现在中国银行根据你公司要求拒付了,一定是找了个单据方面的问题作为拒付理由,而不是以货物不符合合同要求作为理由的.如果是单据没有不符点,那
1）拒付不成立.
2）由买方验货,出具验货证明,将此验货证明作为信用证项下的一种单据,或许可以保证货物符合合同要求.