I'm in a similar boat. I did a change of address January 5th. The computer system was out of whack, so I did it over the phone. Lady informed me that my old one was still valid (for many more years) and my new one should take about a month. I didn't check the site for a while while I waited. She mentioned that while my old one was valid, I would not be able to purchase a gun until the new one arrived. I figured that it was because the shops would make sure the address on the card and my DL matched. Correct or not, it turns out that there is more to that story. I wanted to buy something face to face, so I went on the ISP site and ran myself to see what would happen. It came back denied. I have no criminal record whatsoever, and I'm routinely background checked for work. I logged in to see my account and it said I was active. Then I noticed that they had issued me a new FOID number as well. I ran that one, and it said approved right away. I can't make my purchase, because I know if I was a seller I would have my senses tingling with all this. I would pass on the deal as a seller, I won't expect someone to do something that might be fishy for me. Now, I got a letter from the ISP. Card, right? No, a letter saying my card would be coming. So, they are spending double postage just to inform me that they didn't mail it yet. Hopefully it gets here before the gun I want is sold to someone else.