Can you determine which part is invalid? For example, is it the street name, the zip, the suite #? I'd be hesitant to ship anything to an address that doesn't exist and/or is not valid simply because I'd worry that the buyer would try to scam you when it inevitably didn't show up. Then again, as ng2uDXu4 already mentioned, it could be new construction, though I'd think that doing a "street view" of the area would show whether this was a feasible assumption or not.