Refund On Partially Used Train Tickets Refund Rules
(a) Where a passenger terminates the journey enroute, a ticket deposit receipt (TDR) shall be issued to the ticket holder by the station master of the station in lieu of surrender of the ticket. The original certificate issued by ticket checking staff shall be sent through post to Group General Manager/IT, Indian Railway Catering and Tourism Corporation Ltd., Internet Ticketing Centre, IRCA Building, State Entry Road, New Delhi – 110055.
(b) In case of i-ticket, The TDR shall be issued only upto three days after the scheduled departure of the train.
(c) In case of e-ticket, TDR is filed online upto 72 hours after the scheduled departure of the train.
(d) The TDR shall be issued to the passenger and the passenger may apply for refund of fare within ten days from the date of commencement of journey.
Source: http://contents.irctc.co.in