How to Delete an Unofficial (duplicate) page from Facebook
Log in to Joe’s Facebook
search for page, if it is an unofficial page click on” Is this your business?”
It will give you an option to have an automated call go to the business phone with a code.
Call the owner and make sure they are expecting this call, if possible have them take it while you are still on the line.
They will hear a code, enter the code.
Joe will get a confirmation E-mail and a notification on Facebook.
Joe is now the admin for that unofficial page and it can be deleted.
While on this page, go to “Settings” (top right)
Under “General” at the very bottom of the list , click on “Remove Page” then Delete(page name)
That’s it