Dear :

Thank you for your Letter of Credit No. covering your order No. for [products].

However, we are sorry to inform you that, despite all our efforts, we won't be able to receive the [products] from our supplier before the expiration of the shipping time, [date]. Is it possible that you extend the expiration date to ?

Your prompt attention to this matter will be greatly appreciated.

Sincerely yours,

[name]

[title]