First of all, thank you to everyone who has given advice about getting in the official taxi queue at CDG. I wanted to provide a specific experience of how we almost got scammed so hopefully others can avoid. Upon exiting toward the taxi sign, we were approached asking if we need a taxi. Since I read about this from others, I said “non, merci” and kept walking. Then, in front of the door by the taxi queue, I was asked “Paris-center or elsewhere?” I said Paris- center and was told to walk to exit 16. When I walked out of exit 16, it looked fishy, so my husband asked how much? The driver was not an official taxi driver and said 80 euros, so we turned around and went back to find the official taxi queue. So even when you think someone is being helpful with directions at the airport, be careful!