Dear
When I received your letter of [date] with my check attached marked
"insufficient funds", I called my bank immediately.
The gentleman I spoke with, [name] , discovered that the bank had failed to
credit my account with a substantial deposit I had made several days prior.
The bank has assured me that they will be sending you a formal letter of
apology for their error. Attached is my check in the amount of $ to replace the
dishonored one you have returned.
-商务英语
daiy