In case you are unable to print a ticket, you can present it in one of the smart gadgets (mobile, tablet, etc ...). Since the ticket in the mail comes in PDF format, it is easy to view it on the smart gadget. For some services a printed ticket is required and they do not allow entry if the ticket is presented on the smart device. In such cases the ticket will contain a special note that it must be printed and the user will thus be notified.