They cannot sign in to PlayStation Network
Their profile shows as unavailable or cannot be viewed
Their account name may not appear in friends lists or recent players
They cannot send or receive messages
They cannot join parties or multiplayer sessions
Their online status may not update
Their account may show a suspension or restriction message when they try to log in
They may be unable to access PlayStation Store or online features
Their games may show network or account access errors
They may tell you they received a ban or suspension notice from PlayStation