Unlock Secured PDF for Printing - Version 5.0 If you cannot print your PDF file or when you try to print your PDF document it shows “not printing” message that means it has owner password. This password restricts the PDF file and stops you from printing, copying and editing PDF file. To Unlock Secured PDF for Printing you have to use a PDF Restriction Removal program. Unrestrict PDF software is the top program that helps you to Unlock Secured PDF for Printing. If the PDF file has owner password then the program will remove restriction but if it has user password on it then first you have to provide the user password then the program will remove owner password.