Avis Belgrade Airport SCAM
They charged us 570 euros insurance on a 288 euro car rental. They never even asked us if we wanted that extra insurance. We learned about the charge on our credit card statement. The gas tank was completely empty when we picked up the car and we had to return and ask them to fill up. They claimed that there was a small dent on the hood when we returned the car and wanted to charge us for that. Please avoid this Avis location at the Nikola Tesla airport in Belgrade, Serbia. They have a scheme in place where they prey on tourists and pull these scams with insurance, dent charges and fuel tricks. If you already booked and can't cancel, read the fine print before you sign anything and take pictures of your car rental from every angle before you take possession.