We do not add, edit or change the content of your document. Some of our suppliers do add an order identification code or number at the back cover.
Our suppliers need this order reference to be able to guide the order through the different production stages and match the cover with the content. It is a very important feature and therefore, it cannot be removed, re-sized or placed anywhere else. The order reference is also used for re-ordering and customer service purposes, appreciated by many of our customers.
The order number or code is placed at the right-hand side near the bottom of the final page. So when you prepare your document make sure you don't put any important content in this area because it may get partially obscured.