Source: As worded by Indian Railways, Government of India
If you don't have any ticket, you may approach the Train Superintendent/TTE after purchasing an unreserved ticket from the booking office as specified in the following table. The TTE will allot the accommodation, subject to availability.
| Category of Train | Class of Travel | Min. Class of Ticket required for boarding Category of Train Class of Travel the train at originating and intermediate Stations |
|---|---|---|
| Rajdhani/Shatabdi | IA, FC, 2A, 3A ACC | 1st Class Ordinary |
| Jan Shatabdi | ACC, 25 | 1st Class Ordinary 2nd Mail/Express |
| Mail/Express | FC, IA, 2A, 3A, CC, SL, 2S | 1st Class Ordinary 2nd Mail/Express |
| Garib Rath Express | 3A, CC | 2nd Mail/Express |
However, in case you have a second class ticket and could not get reservation in sleeper class and desire to travel in any upper class, you may approach the on-board ticket checking staff, who can upgrade your ticket accordingly subject to availability of accommodation except in Rajdhani/Shatabdi Express trains.
