Ken,
Where's the confusion, guys?
The confusion, if that's what you want to call it, is that the statute as quoted leaves a little bit of a potential problem for the previous owner of the firearm. Again, assuming that both parties are individuals within the state and the firearm has been previously reported to the state by the seller.
Let's go back to a previous statement you made:
The way I see it, the BUYER should assume responsibility for filling out the form - that's the way it reads in the regs, too.
Okay, you have firearm for sale. You advertise it and get a call:
"Hi. I saw your advertisement and I'd like to buy your large-capacity 9mm. I have the proper license and an FA-10 ready to go."
You meet, he gives you the money, gives you the form all filled out for you to sign, takes it back, gives you your copy and your money and leaves saying he will file the form with the state immediately."
Several months later you get a visit from three or four large men in uniform:
"Ken, you are listed as the last owner of a 9mm pistol used to rob several little old ladies of all their bingo winnings. We found the pistol at the scene of the last crime. Where were you on that day?"
"Oh, I sold that to a guy, here's the form."
"Well, that form was never filed with the state and that name and LTC are not listed in our records, please come with us."
A little far-fetched? Perhaps. But you might have prevented your involvement by filing the form yourself and having that proof.
If you buy a firearm from me, first I will check your license and second I will fill out the FA-10, allow you to proof it and agree, then sign it. I will send it to the CHSB via Certified Mail and keep the receipt along with all other records of that firearm. That way I know that the sale of a firearm which I had owned was reported to the state and I have some documentation to back that up.
Perhaps not as per the letter of the law but in my POV more protective of me as the seller.
Your tolerance of potential risk may vary, but that is your decision.