Section 3(2)(b) in The Railway Passengers (Cancellation of Ticket and Refund of Fare) Rules, 2015
(b)refund of fare may also be granted by the station master of a station other than the ticket issuing station and journey commencing station subject to the conditions that -(i)the ticket is surrendered for refund of fare during working hours of the reservation office and before the preparation of reservation chart, of the concerned train, for the station from where the ticket is valid; and(ii)the genuineness of the ticket and its particulars are verifiable at the refund granting station through computer or from record of the station.