I just sold 2 rifles, one here in my town and one I have to ship to TX. The one I sold to a person here in my town I just made duplicate copies of a sale receipt showing the seller's name and the buyer's name and the serial # of the gun and it was signed by the buyer and the seller. It stated the gun was sold to the buyer by the seller and was dated. You don't need anything more than that. If that gun shows up at a crime scene I have signed proof that I sold it to the buyer on such and such date. The gun I sold to the person in TX I am shipping it to his FFL person with a copy of the same type of receipt I mentioned above. Clears me of ownership of the guns and that is all I care about.