In my country (Italy) is kind of illegal. I mean, not carrying too much cash (but of course if they find you with a suitcase full of cash, they will ask you whe

In my country (Italy) is kind of illegal. I mean, not carrying too much cash (but of course if they find you with a suitcase full of cash, they will ask you where you got all that cash from), but you can't pay in a shop more than 2.000 euros (and they will lower this limit to 1.000 and possibly less in the future). Also you can't pay your employee cash, you have to pay in traceable manners something that you want to deduct from taxes like medical expenses, and so on. Transaction with cash between private citizens are permitted tough (like buying a used car in cash), but it's not a good idea to do so if you don't trust the other party (because then how can I prove that I gave you the money?)