Someone I know was landed with a $5000 bill for medical treatment in the usa. They paid $1000 before leaving the country and they haven’t paid the rest and they don’t have the inclination to pay the rest. They are planning to go back to usa but i wondered what would happen once they set foot there. I don’t want this person to get into trouble but I do want them to realise how serious this is. Can someone give me an reply?