在跨境电商B2B业务中，签订合同后，通常客户会按照合同约定按时支付(预付)款项或开立信用证(托收情况除外)。但是也有少数情况，客户不按时付款或开立信用证。这就涉及付款、信用证的开立和修改及收到款项后告知等事宜。
(一)催促付款
在跨境电商 B2B业务中，签订合同意味着交易达成，但是没有付款的交易，对于卖家而言还是有风险的。因此签订合同后，业务员要及时催促客户付款。在此类邮件中，业务员应该提醒客户付款事宜，并告知客户及时付款对于按时交货的重要性。
示例如下。
Dear xxx,
As required in the contract, which was settled by careful discussion of both parties, we wish to call your attention to the fact that we have got the goods ready for some time.
However, up till now, we haven't had any news concerning your payment. Therefore, we kindly ask you to send us the payment as scheduled, so that we can execute your order No.20201 within the contract time. We hope for your kind understanding. Best regards, xxx
(二)催促信用证开立
在催促信用证开立时，业务员应该适当引用合同中相关的条款。如果一再催促，对方迟迟不见行动，可以列举晚开立信用证可能造成的不良结果。例如，造成工厂在生产繁忙季节不能按时交工等，促使客户尽快采取行动。
示例如下。
Dear xxx,
With regard to your order No.CA1305 for 2500 cartons Canned Apricot Jam, we regret up to this date we have received neither the required credit nor any further information from you.
Please note that, as agreed, the terms of payment for the above order are sight Letter of Credit established within 2 weeks upon the arrival of our Sales Contract No. STE027.
We hereby request you to open an irrevocable sight Letter of Credit for the amount of USD 11750 in our favor, with which we can execute the above order according to the original schedule.
Yours truly,
Xxx
