After repeatedly confirming with the staff about the deposit breakdown, we were told that part of it was an upgrade fee for the vehicle and the rest was just a standard deposit. However, after returning the car, no invoice was provided proactively. When we eventually obtained the invoice from the rental platform, we discovered that insurance had been forced upon us. We’ve never encountered such a situation when renting cars overseas, and we’re not sure if this is a problem specific to Spain or Europcar. Regardless, it feels like we were scammed. Everyone should be cautious—it's best to record videos and audio throughout the process as evidence. Otherwise, if the rental company denies it later, you won’t be able to defend your rights.