Interestingly you would find it hard to believe but it is actually possible to upgrade your tickets from a sleeper class to a confirmed ticket in 3 AC. But this has been made possible by Indian railways now.
Indian railways in a bid to provide accommodation to waitlisted passengers have come out with an innovative scheme to make optimum use of all the accommodation available in the train.
Under this scheme a wait listed passenger who has paid a full fare will be provided accommodation without levying any extra charges if vacant accommodation is available even in higher class coaches of the train. Upgrading can be done from one class to the next higher class only (i.e.) from second class to three tier Ac and from 3 tier Ac to first class and so on.
To avail this facility while booking tickets the traveler needs to feel “yes” in the application form, which makes clear your desire to get upgrade if in case possible. While the charts are being prepared the travelers who had filled “yes” for the possibility to get upgraded get randomly selected by the system.
When your ticket gets upgrade to the next level a chart like the waiting list chart is displayed this indicates the old as well as the new status of the upgraded passengers. The original PNR no is retained even when your ticket is upgraded.
The tickets that have been booked in bulk by passengers are not eligible for up gradation. The tickets that have already been booked under the confessional rates and those tickets that partly consist of complete fare too are not eligible to be upgraded to the next level.
It’s worth trying your luck…May be you too get an opportunity to get upgraded on board. All the best and try your luck.