A trip to Europe that started off wonderfully and took a terrible turn for reasons other than this posting, resulted in my needing to change the date I picked up my rental car in Minden, Germany from November 25 to the 26th. Simple enough....not quite... :-/ I notified SIXT that I would be picking up the car the following day and since I had prepaid there wouldn't be any credit, but all was set. The day before I was going to pick up the car I was in the main train station in Hannover and went to the SIXT counter to verify that everything was all set for the following day. The gentleman who I spoke with could not have been nicer and although he tried diligently to locate the reservation, it was no where to be found. After exhausting all other avenues he decided he would call the SIXT location in Minden. Over the course of an hour he tried to contact the branch office and never was able to reach anyone. In any event, I never ended up with a rental car and with the other events that were taking place just chalked it up as a loss (for the good story look for my DB BAHN experience I'll be doing shorty...I could really use some help with that one). A few weeks after my return I was trying to get organized and checked my mileage balances and noticed that I didn't receive mileage credit for the 'car rental' although it had been paid. I emailed SIXT and receive notification that having not picked up the car I was not entitled to the US Airways miles associated with a rental. Normally I would just be disgusted and move on, but I really began to feel annoyed by the email itself which had a 'what, are you crazy and why are you wasting our time' charm about it. I emailed back and asked if they were able to pull up my reservation and see that there had been some difficulty in obtaining the rental. I got a response stating that they had the note that I would be picking up the car the following day, but that is the only thing 'in my file.'. Today I realized that we have exchanged roughly 15 emails over this situation and this is what I wake up to today: "I understand that you originally were inquiring about the credit for you miles, and one of my colleagues advised you that because the vehicle was never picked up, unfortunately we would not be able to credit this miles for you. However I am trying to understand what was the main reason for you not being able to pick up this reservation? I understand that your flight was delayed and that you contacted us advising that you would be picking up the vehicle on the 26th instead, and this information was also noted on your reservation." US $200 (for what would have been 2.5 days in something that wasn't much larger than a 'clown car'.), 15 emails, and no miles later I would like to offer what I hope is useful advice based upon my experience ..... when overseas rent with a car company that has a large presence in your home country, think twice before prepaying (apparently paying for a car is not sufficient when asking to be credited FF Miles from SIXT, which then makes me question how if this contract never was effective then why would they want to take my money. Had I picked the car up and driven it 10 feet would I then be getting my FF miles? I'd contact the pick up location, but even SIXT can't get in touch with them) I am just more put out by the idea that they had an office that's not able to be contacted, collected all the money for the rental, and somehow it is inconceivable that I would request the FF mileage??? Living in Vegas makes you very aware of customer service issues, both good and bad.......this is just bizarre.... Happy and safe travels in 2014 my travel buddies.