I entered a shop today as the clerk was instructing a buyer about how filling out a 4473 and the clerk said that abbreviations were a no no. You can't abbreviate things like "Jr." or "St". I have never heard of this. Did someone mis-read the ATF instructions or was he correct? (It has been a year since I bought anything and I can't remember.) I didn't bother the guy since he was finishing the sale of a rifle.