pstroke is correct. Getting the full $1000 rebate is conditional on several options on the truck as he listed. Most folks will only get the $500 rebate. You can get $300 with out ANY purchase or $500 if you buy $1200 of add-ons. I just showed a copy of my Business license for proof of business and the truck is in my name.
The guidelines are pretty broad as to what qualifies as an add-on. I got a spray in liner, gooseneck hitch, and a roll up tonneau cover. But painted names on the doors, tool boxes, material racks, etc all qualify. Items that Ford can install at factory don't count. i.e No new wheels to replace factory wheels or billet grills.