Fraudulent ways of working
I had three incidents with Avis in the last 1-2 years where Avis is showing inappropriate behavior or maybe even betraying customers on purpose. On a business trip Avis charged multiple insurances that I never asked for and I also was never asked (left the garage in the US as a Preferred customer just showing my license at the exit). On another business trip I returned the car with full tank but got charged a full tank (I could prove by showing the gas station receipt). In both cases invoice was adjusted after multiple rounds of complaints.
The most recent experience was on a private trip to Costa Rica where I booked a car category that mentioned Nissan Patrol or similar but got a Kia Sorrento (with the message Nissan Patrol is not part of the portfolio anymore). The 2 cars are very different (price about factor 3 different, size of car, type of engine (8 vs 4 cylinder), etc.... However, Avis customer care insists that it is totally fine to operate like that (advertising a premium car and renting out a medium sized and priced car(. Unacceptable! It seems Avis is on purpose charging for services that they do not deliver on...