I was given a very nice car and the petrol tank was filled. Upon returning the car on 22nd July I asked the ladies at the SiXT station to come and check the car, I also offered them the proof that I had filled the petrol tank (which is what I was requested to do when I collected the car on 7th July), and they said they did not need the proof and they would check the car later. So I was surprised when (back home) I got an invoice in which they charged me 17,99 EUR for refilling the petrol tank, and even 10,83 EUR for the service of refilling, i.e. 34,58 EUR + 20% VAT = 41,50 EUR for something they didn't do, nor was required ! (Re: invoice 947020607).