Due to enforcement of EU rules it's now difficult to hire a car in Switzerland and drive to France. Last week I therefore hired a car from Avis within the French sector at Geneva Airport, and because I was using the Swiss autoroutes I had to purchase a vignette from the border guards. OK, so one has to follow the rules, but it seems that a car returned with a vignette will have it removed so that the next hirer has to buy another one. Why? A removed vignette is worthless to the company because removal damages it. Is there some sort of payback for the hire companies from the Swiss authorities? If a new vignette is purchased for every hire car for each hire period (say, on average weekly), it's a nice source of income.