My mother and I are leaving from cdg from our first trip to Paris early in the morning and purchased the incorrect ticket in our rush to our flight. We quite suprised when he fined us 70 euro for a 20 euro mistake. We would have happily paid 10 euro a piece for the correct tickets had we known. Sets a terrible tone to the rest of our journey and our memory of the trip. We took the rer blue from Paris to cdg terminal 2. Our agent was PN376. my client number was n°A113213729. Please don't police those who break the rules unknowingly. Thankfully we had 70 euro, but that could break someone's life. A reduced fine would be favorable. Thank you.