In a move that will increase convenience for passengers and also help save paper, Indian Railways will now accept screenshots of e-tickets instead of a paper printout.
Called the Virtual Reservation Message (VRM), a digital reproduction of the e-ticket can be shown to the ticket examiner on a laptop or mobile screen. This means that passengers will no longer have to bother about carrying along a paper ticket if they have the ticket saved on a mobile device.
VRMs will be treated at a par with Electronic Reservation Slips (printouts of e-tickets), while travelling on Indian Railways. Passengers travelling using VRMs will have to carry along one of the eight prescribed identity proofs in original.
Reference : Railway Board Letter No.2008/TG-I/10/P/SMS dated 20.07.2011
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VRMs will be treated at a par with Electronic Reservation Slips (printouts of e-tickets), while travelling on Indian Railways. Passengers travelling using VRMs will have to carry along one of the eight prescribed identity proofs in original.
Reference : Railway Board Letter No.2008/TG-I/10/P/SMS dated 20.07.2011
source