View the list of Sample Business Letters Apology After Cancellation of Order 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. Apology After Cancellation of Order Dear This is to acknowledge receipt of your letter of (date) in which you set forth your reasons for cancelling your purchase order # I am very sorry about the misunderstanding that led to this cancellation and have taken the matter up with management in order to ensure that a problem of this nature does not occur again. As one of our valued customers, your satisfaction is one of our primary concerns. Please accept our apology.