Michael: [on the phone] You think my dad would ever even go for something like this?
Barry: You know, it's very hard to get a signature out of him. It's like somebody a long time ago said...
[flashback:]
Young Barry: Hey, what if you never signed anything? Because you said you didn't have a signature? Just like you, Pop.
Young George Sr.: You don't have a signature?
Young Barry: No, he's never given me one card. Not one birthday card, which is why his presents are always money orders. Right, Pop?
Herb Zuckerkorn: I don't have a signature.
Young Barry: Oh! If you don't sign, you will be fine.