Greetings from Paris! When exiting the metro today on the Left Bank at Sevres Babylone to shop at Le Bon Marche we were stopped and asked for our metro ticket. Our understanding that you can throw your ticket away when exiting the train is incorrect. We mentioned this to one of the four metro guards stopping people demanding their tickets, and they said that you have to keep your ticket until out of the subway station. They further commented that my husband and I had to pay a charge, a fine. I commented that we should go down and check the garbage container on the metro platform: we did and retrieved our tickets … no charge. The guards were then most gracious. I commented that I was taken aback for we are tourists in Paris to support France and Paris in light of the terrorist events of the past 18 months. It seems because there are fewer tourists in Paris, there might be a kinder treatment of tourists who are misinformed. No response: do be aware to keep your ticket until you are out of the subway area. For Parisians on this forum: do the metro guards check tickets more at the end of a month to collect more funds/charges for that month? This business certainly surprised us as regular visitors to Paris for we are faithful metro users who do not violate the system.