Originally Posted by
BA_Jfan
Upon arrival none of the 3 turnstiles would take my ticket. I didn't have time to ponder why so I decided to just buy a new one at a vending machine. The first vending machine had a very non-responsive touch screen. But after punching the English button multiple times it changed languages. I saw that for 9.5 euro I could buy a ticket to CDG. I selected that option then clicked pay by card. I put in my Diners Club MasterCard. It didn't work. I try it 5 subsequent times. Nothing. I try my Ally Bank MasterCard. Nothing even with 6 tries. I repeat the process on the machine next to it. Same result. I notice an information desk. I hand over my ticket and I ask in slow, clear English if there was some problem. She said she didn't know. I ask her if she could sell me a ticket. She told me to go the machine. I explain the problem to her. She says tough luck. I tell her my flight is in 3 hour and I really need to get to airport. She says too bad. I left the station and go into the hotel next door.
This is definitely frustrating, but a little research would have helped you in advance.
The ticket machines for the RER-B accept only European-style credit cards with a chip. They do accept coins, however, so you go to the change machines adjacent to the ticket kiosks.
Alternatively, you CAN use an American-style credit card in a Metro station, and those kiosks will sell you a ticket for the RER-B.
Sorry you had a frustrating experience. Live and learn...