I got delayed once. It had been a while (3 or 4 years) since I last purchased any firearms. So when filling in the form on the line that that ask for SSN and indicated it was optional I didn't put my SSN on the form. Of course when it came back delayed I freaked, I had just got my lifetime permit never any problems what so ever, how dare they screw with my rights (*#*&& *&^(%#$). The clerk siad that I had a common name and since I didn't put my SSN on the form thats why it got delayed. I don't know if that is true or not but I did get the rifle(the next day) and have bought several since then with no problems. I do put my SSN on the form now all the time.