The world I play (W112) has the following information on the Account Sitting page.
View attachment 5476
"24 hours after the end of the account sitting." 24 hours is indeed the case for the world I play on. You would need the original poster to add more information or clarification on his individual issue
48 hours simply causes a problem for him with support troop operations.
He's asking for 12 hours - which I can see is going to far - but I don't understand why it can't just be 24 hours - casual world or not.
I can't see the benefit / additional security.
It actually causes more issues for inexperienced members (I think anyway).
(On a side note. The contradiction of co played accounts has always made me smile over the years more than pay to win. There's no way I'm giving my account password out to a stranger on the internet )
