I guess I'd make sure it was paid for in cash, on an old dirt road. Cant trace that.
Many, MANY, legal probs could happen. If they are friends, barter......get some beer, meat, lap dance, something other than a check to cover your "boston butt".
The world is crazy when you watch the liberal tv stations. In my "circle" I wouldn't be affraid to sell something I smoked to a friend, neighbor, wifes boyfriend.....etc. :) You already know who would stick it to ya, so play it safe.
If ya wanna go "big time", then cross all the "t's" and dot all the "i's". People are always lookin for a free ride through life. If you find a free-loader, roll'em up in an old rug, gray tape it shut good, and send them down the river...........then send the sausage to me. I'll dispose of all the evidence :) !
good luck as I didn't really tell you a "dog-gone-thing".