If nearly none of the professionals do it then calling it "unprofessional" not to kind of misses the mark, doesn't it? The closest thing I've gotten to papers is the receipts Ben Rennick sends with his animals that have the picture of the animal you bought, but that's it. My bumble bee was from Wilbanks and she didn't come with anything (bought her online, picked her up at a show). Lack of papers isn't a big deal because no matter the situation you're relying on the person's word anyway. Even with hets, the papers don't mean anything if the seller has a bad reputation or if the animal doesn't prove out, does it?