Help with registrations 1 + 2

Hello together, I have following request to first small story. I bought a used car contractually private everything i.o. have hu protocol and registration papers part 1 and 2 get after the subtracted contract I unfortunately noticed the in registration papers part 2 not the seller name stands only in part 1. I spoke with the seller he meant his are on the bank which I also pointed out. he also said it would go dads car registration with a fee of about 30 euro. zul certificate part 1 and 2 but have the same vehicle identification number. my current question someone knows this situation ? sorry about my sentence constructions dyslexia hope you can help me. thank you in advance and a nice Sunday.