It's worth noting that we know
for a fact that Jack has accounts with at least two banks. She said this herself when the ATM swallowed her card and she demanded that the teller give her money, trying to use her tattoos as ID.
The whole incident was hilarious, but part of what made it so funny was that the card & account in question were from Bank A, but she was in Bank B kicking up a stink. Even without the tattoo ID thing, imagine going into HSBC and saying, "Hi, I have an account here and one at Barclays. Give me my Barclays money please."
I'm with
@Veronicaaa. She's just thick.