The best way to prevent guild scamming is to never transfer away guild leadership! I know that shiny new guild hall is appealing but don't fall for it. Only transfer leadership away if you no longer wish to be the guild leader, it's that simple!
However, we understand that mistakes happen and we can recover your guild if you contact us soon enough. Simply create a support request by clicking the Email Us link on the right side of the page.
Please be sure to include your character name as well as the character that you transferred leadership to. If we can verify everything through the logs we will restore leadership back to your character.
Remember, be careful in the future and never temporarily transfer away leadership.