Offline cleric rezzing?

[Hakubi]

Is it possible to rez someone who is offline and the box would be there when they log in? or do they need to be online upon cast? Was thinking about starting a cleric alt for rezzing my main and maybe parking him outside wherever I was leveling for my own rezzes. I know you can consent your offline rogue alt and drag your own corpse, so I was wondering if rez worked the same way.