bill - 6:08 am on Jul 26, 2013 (gmt 0)
There is an option in the Page Info settings where you can note the official brand your Page is about, but you wouldn't need to set that. The people who are doing unofficial versions of your brand would.
If a Page exists about your business you can try to claim it by Reporting it. Then FB will ask you to e-mail and send some documentation to prove ownership of the business.