You have to carry original valid id while travelling.
Valid IDs to be presented during train journey by one of the passenger booked on an e-ticket :- Voter Identity Card /
Passport / PAN Card / Driving License / Photo ID card issued by Central / State Govt. /Student Identity Card with
photograph issued by recognized School or College for their students /Nationalized Bank...
more... Passbook with photograph
/Credit Cards issued by Banks with laminated photograph.