I'm in Ohio and have done some F2F sales at the Goodman's gun show. You're not required to do any more than be residents of the same state and legal age (18, and I think 21 for handguns) - so you both need to see the other's ID. I, however, made out both a receipt and a record for myself both times - no printed address or anything, but the date, price, serial number, and signature of both parties are what I require. I don't really care whether ATF/FBI/Some Other A-holes can read the purchaser's signature, but it's not my signature and I have already done more than required by law by having any record of the sale at all.