Clueless

Woman @ the RFID checkout tells me that the screen says that she can't check out.  I look at her account and tell her that she has $64 in fines.  I tell her that the fines are for overdue materials.

Woman: What do you mean?
Me:  It is x amount per day, and these books are more than a month late.
Woman:  I didn't know there was a due date... that's why I checked out so many of these kids books.
Me: The due dates are on the receipt.
Woman: I threw away the receipt.  I just thought we could take as many as we want and return them when we can.  I never heard of a "due date."  OMG, my husband is going to kill me!