Railway e-Tickets are paperless electronic tickets, and i-Tickets (Internet tickets) are a version of paper tickets. The ticketing system was initiated by Indian Railways for people who do not have access to ticket booking counters to book counter tickets or to print e-Tickets.
Passengers with access to the internet can book i-Tickets through the IRCTC website, and a printout of the ticket is delivered to them through courier. However, the provision for booking i-Tickets has been discontinued by IRCTC from 2018 onwards. Currently, only e-Tickets online booking through IRCTC is allowed.