how can someone disappear off my friends list and from calling cards and from transactions

[Shutterbug Release]

can an avatar name on friedns list disappear from friends list , calling cards, tranaction page , ect.? its like he never existed

[KarenMichelle Lane]

Actually yes. Under these circumstances:

1) Their account has been deleted by Linden Lab usually for an egregious offence or two.

2) The account holder has requested that their account be deleted and that the criteria has been met and the Linden Lab clean-up processes have finally completed the task.