Banking and AH on seperate account

Hey Guys.
First i wanna say thank you for a really nice server, this is my first vanilla experience since actual blizz servers, and it has been a pleasant ride so far.
I was told that it is allowed to use 2 accounts, if one is solely for standing in orgrimmar handling trades/banking/disenchant/scanning ah. Since I don't want to risk losing my account, i just wanted someone to clarify if this is true?
First i wanna say thank you for a really nice server, this is my first vanilla experience since actual blizz servers, and it has been a pleasant ride so far.
I was told that it is allowed to use 2 accounts, if one is solely for standing in orgrimmar handling trades/banking/disenchant/scanning ah. Since I don't want to risk losing my account, i just wanted someone to clarify if this is true?