If I'm using 1 Metro-Tram-RER ticket on my Navigo Easy pass to go to Avon - Fontainebleau, do I have to validate the ticket again when I take the train from Gare de Lyon (if my journey started at another metro station in Paris)?
1 answer
If you need to pass through fare-gates again at Gare de Lyon station (to reach the Fontainebleau-Avon train on Transilien R train line for example), you would have to re-validate your Navigo Easy in order to open the gate. (it's been a while since I've visited Fontainebleau-Avon, so I don't know if they've put up barrier gates for this line or not).
The re-validation of your Navigo Easy should note the currently active MTR Ticket and not cost you another Paris Metro-Tram-RER ticket.