Credit Card Discussion

Will they have any problems since the tickets would have been purchased from my credit card and I am not travelling with them?
Will they need to show who has purchased tickets for them?
If yes, how do they prove their relation with me?
What documents should they carry for their personal identification?
What documents should be carried by [...]

I am a frequent rail traveller and book tickets online on irctc site. My present credit card company levies service charges and tax on the booking amount. Is there any other credit card, which does it free of cost?

Where is the card number and Security Code locate on a VISA card? Cause am trying to buy some tickets online for a concert.