Europcar accepts reservations from several websites (such as CarJet, which was the case) but then charges the rental claiming it is not paid. Actually, in this particular case, the reservation could only be made if paid in advanced and there was a PREPAID VOUCHER, which Europcar simply ignored. If CarJet is a scam, Europar is in with it and couldn't care less about it's clients. This happend in Europcar at Luxembourg Airport. I am still waiting for a refund, while Europcar just says they have nothing to do with it (curious thing, they had my reservation, which means that there is an "open line of comunication" between both companies. Maybe they split the profit of overcharging the costumers...). AVOID Europcar.