If after charting for the second pax if not traveled TDR should be filed with non traveled certificate received from TTE.See the wording as mentioned in E-Ticket copy important points.
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Obtain certif icate f rom the TTE /Conductor in case of PARTIALLY waitlisted e-ticket, LESS NO. OF PASSENGERS trav elled, A.C.FAILURE,TRAVEL IN LOWER CLASS. This original certif icate must be sent to GGM (IT), IRCTC, Internet Ticketing Centre, IRCA Building, State Entry Road, New Delhi-110055 af ter f iling on-line ref und request f or claiming refund.