When we were in Portugal 2 XMass ago our Visa would not work at the pump-it-yourself Autostrada gas pump. The Cafe attendent told us that we had to hit the "enter" button twice, and "viola", it took our US Visa. ( If I remember correctly, the pump kept asking for a PIN number. By hitting "enter" twice, we were allowed to bypass that, and then the card was accepted)
Now we are preparing for a May trip to France, and I read in the RS book that our Visa would not work on the un-manned freeway toll booths, and un-maned gas stations. ( I thought that we used it in the un-maned automated toll booths in Portugal, but don't remember. Maybe we drove up to a booth that was "attended".)
What is the truth? Do we have to use cash, or will our VISA's work like they did in Portugal?