Offical website of IR shows the following thing:
The mandatory requirements of authorized SMS are :
·SMS sent by IRCTC/Railways
·SMS should contain details such as PNR, Train No, Date of Journey, Class of Travel, From and Destination, Name and No. of Passengers travelling, Fare, Surcharge.
·If...
more... feasible all the names of passengers, else the maximum No. of passengers.
The authorized SMS containing all the aforementioned vital details when displayed through laptops/palmtops/mobile phones combined with valid photo Id in original shall be treated as an instrument on par with the ERS.