外贸催款信怎么写？

一、外贸催款信怎么开头：
Again we call your attention to your payment due April 30.

We again call your attention to thefollowing invoices which, according to our records, are still unpaid wellbeyond our normal terms:

Once again, we ask for your cooperation inpaying your account which is now more than two months past due.

We have not received any response from youto the recent reminder we sent you on May 20 about your overdue account.

You did not respond to our first reminderof your overdue balance of $2578.50.

You have not answered my previous lettersasking for payment on your $2578.50 purchase.

二、催款信中说什么理由

Would you please let us have an explanationof why the invoice is still outstanding?

Please let us know why the balance has notbeen cleared.

We would like to know if there is a reasonfor your delay in paying your long overdue account.