> Which leads me to wonder - how do counterfeiters insert their fake coins in the monetary system? Where can you spend a lot of coin without arousing suspicion?

> Which leads me to wonder - how do counterfeiters insert their fake coins in the monetary system? Where can you spend a lot of coin without arousing suspicion?) There are plenty of corner shops that'll happily sell you duty free tobacco amongst other non-legal things. I'm sure they'd be happy to take £100 worth of fake coins and mix them into their tills/takings/change if it only costs them £40. The difference can go into their pocket.