not everyone is wise to these scams im afraid.
My own mother was scammed in a similar way and send off money, She was down at work and skint when she got a very convincing letter through the door. She sent off £40 admin charges and pinned her finacial hopes on recieving a cash lump sum.
By the time I found out she had already sent off money to them and there was nothing I could do.
I told her off and seen my arse a bit, but that just made her upset and I felt bad about it.
She is NOW wiser to these scams.
its the same as when everyone uses the internet for the first time and sees "Congratulations your a winner" banner. they are non the wiser.