Plot hole: It is not money laundering if you give FBI marked bills to the banker and he hands you back the same marked bills. If the banker had handed back unmarked bills, in regards to the check for cash exchange with the kid, then the FBI teller would never have figured out that "Macintosh" was using the marked FBI money. Thus the money would actually have been laundered. The main villain did not actually do any money laundering, only bank robbery.
Blank Check (1994)
2 plot holes - chronological order
Directed by: Rupert Wainwright
Starring: James Rebhorn, Brian Bonsall, Jayne Atkinson, Karen Duffy
Continuity mistake: Immediately prior to Preston and Shay dancing in the fountains, Shay is wearing high heels. While dancing in the fountain, she wears flats. After leaving the fountain she is once again wearing high heels.
Butch: I think this guy's been drinking vodka.
Carl Quigley: I have not! I don't drink! Seriously, I don't.
Trivia: Once Preston is driving off in the limo you notice that the limo's plate changes from "EZLIFE" to a standard plate number.
Question: How did Preston's backpack end up in the wide park area even though he left it in the woods?