Board Thread:Questions and Answers/@comment-25159376-20140203143420/@comment-4516358-20140203144636

I've always treated it as gold storage, but perhaps they offer vaults to store wealthy items too. Of course, it's a game mechanic to access the same items, elsewhere.. But it can work with gold... since a bank.

I believe Varis Grey / Grey Newt owns various banks around Gielinor.