We used Canadian paper currency, which annoyed other banks and, ultimately, the Bank of Canada, and the Royal Canadian Mounted Police. The client eventually pulled it, and we re-shot eight more, this time with coins, which didn't violate counterfeit laws and kept us all out of federal prison.
A few of those with coins are here. The paper currency files are in plastic baggies, in a vault at RCMP Headquarters.
Shot and directed by the passionate director/camerman, Steve Gordon.