I think it’s illegal in USA but rules were relaxed when there was a penny and nickel shortage in 2021 


Bell_curve

I'm not sure about the law in the Netherlands, but I've seen this in Portugal too. As far as I know, it's illegal to refuse cash payments here.

0xbitcoiner

alter_native

The Death of Cash Transactions Around The World

At least in the Netherlands, there are merchants that only accept cards and refuse cash, and they advertise it openly on their doors to make everyone aware. I suppose that they are "allowed".

I have heard also that in the US there are "cashless" businesses popping up. Also, try paying with cash at an airline check-in counter for extra luggage or whatever; they only accept cards.