We have a signiture line as well, but don't need a notary. In Pennsylvania it is illegal to have an open title, meaning that a buyers name must be filled in.
Here in Delaware, on the bottom of the title there is a perforated piece that the seller takes off, fills in the buyers name, address, and drivers license number, and mails it to the DMV. You need to do that same day too. Delaware doesn't mess around.
My friend got lucky and has vowed to gut the PO if he ever sees him again. I still kinda wonder about the whole story though.