IRCTC train ticket cancellation rules 2019

Received from a friend in Railways so sharing for everyone's benefit.

Cancellation before charting: Login to your IRCTC account by entering the correct username and password. TDR filing is not possible through any other user ID. Upon cancellation of ticket or TDR filing, IRCTC will process the refund amount electronically and credit the amount in the same account, which was utilised at the time of booking of tickets.

IRCTC train ticket cancellation after charting:
For the confirmed tickets, TDR can be filed online up to four hours before the scheduled departure of the train, and for the refund of the fare.
Login to your IRCTC account on the e-ticketing website by entering the correct username and password on the login screen
Go to ‘My Transactions’ and click on the ‘Booked Ticket History’ link on the menu bar.
Here, all booked tickets will be displayed. Select the ticket which is to be cancelled and click on the ‘cancel ticket’ option. Initiate the cancellation by selecting the passengers for whom the ticket has to be cancelled
In case of a partial cancellation, the passenger must get a fresh printout of the electronic reservation slip (ERS) for passengers who are continuing their journey.
Select the check box before the passenger’s name and click on the ‘cancel ticket’ button.
A confirmation pop up will be displayed at this stage. Select the ‘OK’ button to confirm the final cancellation of the ticket.
On the successful cancellation, cancellation amount will be deducted and the refund amount will be displayed on the screen. A confirmation message for cancellation will be sent on the registered mobile number, which was provided at the time of booking.
Along with this, a confirmation mail for the cancellation will be sent on the email ID, which has been registered with the IRCTC user ID.
In case the train ticket has been partially cancelled, a fresh ERS needs to be carried by the passenger

IRCTC cancellation of fully waitlisted tickets:
The fully waitlisted tickets are those tickets in which on one PNR, all the passengers are on the waitlist. Such PNRs are dropped from the reservation charts at the time of preparation of final train charts and the refund is credited to the customer’s account automatically.
Such passengers are not required to send the online requests for ticket cancellation. IRCTC will cancel such tickets after the due verification and will process the refunds electronically
On a PNR which has all passengers on the waiting list at the time of charting, the names of such waitlisted passengers will not appear in the charts and those passengers, if found traveling, will be identified as unauthorized and will be charged accordingly.
However, on a PNR which has some passengers confirmed or as RAC status and some passengers on the waiting list, all the names including those on the waiting list will appear in the chart more