The duty TTE was not very much conversant on the relevant rules. But, he has charged not even a single rupee for allotting a 2AC berth in the same HA-1 coach. He has entered my daughter-in-law's name in the chart as well as on the printed hard copy of e-ticket properly with his signature and mentioning the PNR Number against the allotted 2AC berth number. So far as refund of difference is concerned, he suggested not to proceed because for issuing of the certificate he will have to charge penalty for boarding the train with a WL ticket. Thus, at the end, matter would remain almost the same financially. No refund can be claimed as journey is actually being performed. My son accepted his suggestion very gracefully and thanked the TTE for his appreciable and wonderful co-operation.