Preparation: Before you go through this checklist, it is a good idea to make sure that your copy of the PDF Stamper didn’t get corrupted. – Any error that is preventing you from stamping the file – White screen after you hit the stamp button – An error occurred while trying to stamp the file! If you are receiving one of the following errors when trying to stamp a PDF file then please go through this checklist which will help you identify and solve the issue: