When you book a ticket online or through the Amtrak app, your ticket is sent electronically as a PDF. Save the ticket on your mobile device and present it to the conductor upon request. If you prefer a paper ticket, print out the e-ticket and bring it with you. You can also ask for a printout of your ticket at an Amtrak ticket window at staffed stations. You can also ask the Amtrak agent on the phone for a confirmation code that can be given to the conductor in lieu of a printed or electronic ticket.