Are they doing that also? I thought that was the North Koreans. A pox on both their houses!
I read that Iran was counterfeiting US dollars in U.S. News & World Report. (Eight-ten years ago).
Here's what I found in a few minutes' search:
"CIA believes that Iran is the #1 counterfieter of US $100 bills in the World. NoKo’s a distant second. Both use state resources to make the funny money so that the bills are almost impossible for anyone except the Secret Service to catch..."