A guild bank is an in-game storage interface for holding items and money to be shared among guild members.
Official guild banks
Blizzard-supported guild banks were introduced with patch 2.3 to help reduce player-created guild banks, which were prone to Terms of Use violations due to account sharing.
Features
- Access to the guild bank via a Guild Vault object next to the standard bankers in the game.
- 6 purchasable tabs which have 98 item slots each; bags are not required for the slots. The price for the first tab is 100
, and increases for each successive tab, 250, 500, 1000, 2500, 5000, for a grand total of 9350. - Storage of money.
- Players with the appropriate permissions can store items and money for use by the rest of the guild. The guild master can allocate different permissions to each tab as required.
- Repair NPCs have a 'pay for repairs from guild funds' button based on guild permissions (up to withdraw limit).
- Advanced permission system (defaults to controlled by guild leader) that can allow, disallow, and limit the interaction (deposit/withdraw items or money) per tab, per guild rank. Withdrawal limits can be set up.
- Access logs in-game showing the 25 latest money- or item-related withdrawals/deposits per tab.
- Web access and display via World of Warcraft Armory.[1] Requires login.[2]
- Where to find the guild vaults.
Guild bank characters
- Main article: Mule (game term)
A character used as storage and/or a trading post by the members, usually accompanied by a web-based script to post the contents online. Bank rules depend on the guild; there is no set of default permissions.
NOTE: It is not recommended that multiple guild members log into the guild bank account, even if it is more convenient to manage and disperse items, since this is a violation of the Terms of Use according to 
[Blizzard]. Due to the many potential issues involved with this approach, it is highly recommended that guilds spend the gold on the official guild bank instead.
Gallery
Guild Vault on the side of Darnassus bank
Guild Vault inside the bank of Exodar
Guild Vault inside the bank of Ironforge
Guild Vault inside the bank of Stormwind
Guild Vault inside the bank of Orgrimmar
Guild Vault inside the bank of Silvermoon City
Guild Vault in front of Thunder Bluff bank
Guild Vault on the side of Undercity bank
Guild Vault inside the Aldor bank in Shattrath City
Guild Vault inside the Scryers' bank in Shattrath City
Guild Vault inside the banks of Dalaran
External links
Official US site Guild Banks
Official EU site (en) Guild Banks