Tf2 Premium Problem

His account might be on probation. If it's been the first purchase he makes or something like that he'll have to wait. Also your friend sounds like your alt idling account :p

From where he bought the keys? If he bought from the market, it won't work. You need to buy something inside the game.

I don't use an idling acount he just asked for my help :)
He bought the keys from the mann co. store.
What do you mean by probation? Is it like the servers did not updated yet?

Ok thank you!