Electronic railway ticket is a valid travel document that gives a passenger the right to travel by rail.
You can buy an electronic train ticket on the Travelbook website, you don't need to exchange it for a paper ticket of a strictly accountable form at a ticket office. Go straight to boarding a train. Show your identity document and electronic ticket form to a train conductor who will read out a QR code using a special device and carry out a boarding.
Electronic train ticket can be presented in both a printed and electronic form. Train conductor can simply read out a QR code from the screen of your phone (tablet or laptop). If a train conductor cannot read out a QR code for some reason, he/she can manually enter a ticket number into his/her device.
It is worth noting that an electronic railway ticket is a payment (fiscal) document and is accepted by an accounting department to compensate for travel by train on a business trip. In addition, electronic tickets are almost impossible to lose since you can print them on your own an unlimited number of times.