From WoWWiki
One of Shattrath City banks
Shattrath City has two
banks based on the outer rim of the
Terrace of Light. The bank in the southeast is controlled by the
Scryers, and the one on the northwest is controlled by the
Aldor. Alliance and Horde can access either bank, but a player associated with the Scryers cannot access the bank controlled by the Aldor, and a player associated with Aldor cannot access the bank controlled by the Scryers.