Con men have been preying on English-speaking passengers arriving at Paris’ Gare du Nord railway station on the Eurostar train from London when they try to buy tickets at machines for the Paris Metro. Friendly hustlers offer to assist travelers in navigating the instructions, explaining that they will save money if they buy a “carnet” of tickets rather than a single ride, then take the money from them to feed into the machine. Only when the ticket is handed over and the friendly local has left do the tourists realize they’ve purchased only a single ticket after providing significantly more for a batch of tickets. Eurostar now recommends buying Metro tickets at the Waterloo station to avoid such scams.