Yes, they can sell you something and later tell you it is on backorder. Use this letter template to let your customers know the items they've ordered are on back order and will be shipped as soon as possible.Find out what goes into writing effective, heartfelt customer apology emails with these best practices and free templates. In this article, we will explore: 1. Best practices for writing an escalation email. 2. A message from Town Supervisor Don Clavin. Jose Peace Officer's Ass'n v. For ideas on new or existing Promotions, please fill out this form. Looking to implement tech in your mail? Backorder Notification.