Thank You for Product Unacceptable Summary Attached
Thank you for your check in the amount of $ [dollar amount], which was in payment of the discount inadvertently taken in paying invoice [#]. We are sorry that there was a misunderstanding regarding the period of time allowed in which to take advantage of our incentive discount. We appreciate having had the opportunity to clarify our policy with you.
If you have any other questions regarding our credit policy, please contact us. We will be happy to provide you with any information you require. Thank you very much for your recent order.