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Hi gygnyc! Have you purchased a paid Moz Local account? If not, I would go ahead and do that and you will be able to provide Moz with the correct URL for your Facebook page. Sometimes it takes a little while for Moz local to pick up on the listing -- even if you provided them with the exact URL. I would give it some time, continue to monitor it, and then if it still does not pick up the Facebook listing I would reach out directly to the support team. Hope this helps!