Whether you’d like to switch factions to join friends or family, or simply to experience Azeroth from a new point of view, the Faction Change service enables you to switch your character from Horde to Alliance or vice versa. Any faction- or race-specific reputations, items or mounts will be automatically converted to your new faction’s equivalent.Here's how it works:
Step 1 - Select Your Character
Connect to your Battle.net account and select your World of Warcraft account. Click "Faction Change" under "Character & Guild Services, then select the character you’d like to switch to the other faction.
Step 2 - Choose Your Race
Log in to World of Warcraft. You should now see the button below:
Click on this button to choose your new race (compatible with your class). An optional name and appearance change are included in the service.
Step 3 - Ready to go!
Once your character is ready, enter the game and your character will appear at the main capital city of your new faction (Stormwind for the Alliance, Orgrimmar for the Horde). Congratulations, you’re done!