u can show the SMS bearing PNR , DOJ & TOJ , Train No , Passenger name , Class (u might have received during booking from IRCTC) . else type these details in ur draft and show it ( NO TTE will check it whether it s from irctc or from anyone ) - sometimes i will say my mob s switched off and he will verify the ID card and name in the chart and he moves out....i have an old sms from irctc , and will replace the PNR,DOJ/TOJ,Coach/Seat , etc and show to TTE ...