When I shipped to Gunnar it was fairly simple.... I called 1-800-731-4000 and pushed buttons till I got to the ATT option and told the person what I wanted to do.
Gunnar had already given me his Firearm dealer #, they needed that, so it was a painless 5 min on the phone. I told them I wanted to post it that evening when I got home, so they faxed me the TATT to take it to the postoffice, I also had the option of them just giving me the # over the phone to write it down so that I wouldn't have to wait a day or 2 to mail it in the event I had no access to a fax machine.
I mailed it and 2 days later Gunnar told me he got it. Then 2 days after that he told me what was wrong with it, how much to repair and how much he could do in trade...... I took the trade and here I sit waiting for the postman.
So far its been 2 weeks as of yesterday, fairly easy and painless...... Other than the fact I got burned buying a used gun online..... but thats another story.