Any type of sale where you are creating a note in return for anything.
Whether it be a car, home, pickle, or the rights to something. If you are financing the sale, you have to claim the gain in that year.
It may vary state to state however. But I doubt that it will affect your federal taxes. (i.e. you may not have to claim it on your state, but on your federal you will)
This is all from my research as an investor, not from being a CPA. I've not came across this issue before as I've only dealt with more "traditional" investment types in the past. (i.e. straight renting or straight selling)
From my limited knowledge in the area, the IRS wants you to do it in one of two ways:
Treat it like rent
or
Treat it like a sale
If you are not on the title, it's a sale. If you are, it's rent. (In my book)
John Hyre slates an aggressive tax stance for RE investors, I'm not sure of what he is doing in it, but may want to take a look at it.
http://www.realestatetaxlaw.com/