Yep, in Alabama if the car is older than '75, it has no title...ownership is transferred through bills of sale....so, if you've got an older car & had a notarized bill of sale with a current Alabama registration, you could get your state's title...
...that's basically what those guys do: find a place where they can acquire the paperwork to get a title & then go to a state where its pretty easy to do so...you get the result