I watched two guys get denied Monday at the counter. Ignoring the guy who didn't know a DV conviction would be a problem, the other fellow has a father and two brothers with the same first name, the only difference being I and II. And, they are all felons, except for the buyer. The gun dealer called the FBI NICS and got the first check cancelled, then, after convincing the buyer to amend the 4473 with a SS#, resubmitted it. Still denied. In any event, it appears that amending a 4473 is OK.