Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
At Paris Charles-de-Gaulle airport, can I use a €20 note to buy a €10 RER ticket?
The RER vending machines will probably only accept coins and card payments and no bank notes at all. At the airport, there are however staffed ticket counters where you can buy a ticket and pay cash and get proper change.
Required, but never shown