Quote Originally Posted by Ryios View Post
A while back I was able to join a dungeon on one character and alt f4 and log in on my main and friendslist my alt because he was still logged in. Not sure if you still can though, they might have patched it. But I can still mail my alt even if they fixed it.
This method was patched, though not retroactively. Didn't have to close the game. Merely logging out in the instance was fine.

The only thing worth transferring if your highest level is in the 30s would be money. If you have ever worn your equipment in combat, it's bound to your character and can't be given to others.