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Hello, First question here on moz.  I live in a small town, and some of my clients do as well.  Some mail is delivered to physical locations, however most mail is delivered to PO Boxes.  I have tried with some success to get the mail workers to flag Google and others post cards.  Otherwise I am not able to verify ownership.  Any ideas or help on how to verify businesses that don't get mail at their location would be great. Dave