In addition to the $100 bills seen during the opening credits being the wrong style for the period, they all have the same serial number: SG18017583Q. Also, the term "Secretary of the Treasury" is missing from beneath the signature o n the right side of the bill; the picture on the reverse is incorrect, and the image used of Ben Franklin has never been used on US currency.
In the beginning of the movie its supposed to be 1983, however they show a big pile of modern US currency spilling on table with the current large President's head on the bills.