Hi. I am building websites for local lead generation for example mycityplumbing etc. How would I add a google places listing for lead generation websites like that where they do not have an address I can let google mail the card to? If I get a po box would that work? Can you use a po box for multiple business listings or only one or a few? Is there a way to do it without entering the address and having it listed in the city on the maps for the local listings on google on there?