system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Peru is the world leader in producing counterfeited dollars with super good quality, and those are just individuals, so if a small group of people can do that why wouldn't corrupt governments print dollars since they already have more resources to them?

I just watched this small documentary on ViceNews on youtube that was really well made. It shows how Peru is the number one country at producing faker dollars. So I was wondering if those individuals can already produce such dollars with really close textures, security features and everything why wouldn't corrupt government overseas do the same since they already have all the printing machine, more experts and resources etc?
gpt
They can and do.  North Korea and Iran, in particular, are suspected to print counterfeit dollars.

However, those countries have the same problem that drug dealers have when trying to spend the money.  For example, if you show up at a bank with $50,000 in cash and try to make a deposit the bank will ask you where you got the money from.  If you can't demonstrate that the money came from a legitimate source, the bank will refuse to accept it because of the risk that you made the money from selling drugs or some other illegal activity.

Likewise, legitimate companies, banks, and governments will be very suspicious of cash payments being made in dollar bills that are coming from countries which don't have a legitimate source of dollar income.  

This means that countries printing fake dollars can only use them to make payments to small entities in places where oversight is lax, like India or Pakistan, which itself severely limits the amount of counterfeit dollars that they can produce in a year.