In short, unless the buyer has a town issued CCW permit, you need to submit all the background check information to the local PS. However, because most PD's believe that private party sales are illegal in RI (because many of the cops in RI are mentally retarded) they will likely have no idea what to do with the paperwork you submit them and show up at your door with a search warrant and a SWAT team (Just kidding, they will most likely ignore anything you hand them) . Unless your seller has a Town CCW, just do it through an FFL. Sorry to break the news to you, but RI is full of stupid.