I'm selling a Charvel socal and a person on the other side of Australia is requesting I remove the neck for shipping. I was wondering if this is a safe thing to do. Should I do anything to the truss rod, since there will no longer be any string tension to counteract it? I don't want to cause any permanent damage.

yeah, i think you are right, remove all the load on the truss rod.
I've been imitated so well I've heard people copy my mistakes.
- Jimi Hendrix