View the list of Sample Business Letters Thank You for Substitute Check After Denial of Discount Disclaimer: Be aware that some of these sample letters have legal, financial, or other implications. If you are not sure about the use of any letter, consult with an appropriate professional first. Thank You for Substitute Check After Denial of Discount Dear Thank you for your check in the amount of $ which was in payment of the discount you had inadvertantly taken in paying our invoice # We are sorry that there was a misunderstanding regarding the period of time allowed in which to take advantage of our discount incentive and appreciate having had the opportunity to clarify our policy with you. If you have any other questions regarding our credit policy, please contact me and I will be happy to provide you with any information you require. Thank you very much for your recent order.