AVIS, as one of the leading global rental companies, engaged in deceptive practices during the car return process. They altered the return time and charged nearly 90 euros for a full tank of fuel despite the car being returned with a full tank. Thankfully, I kept the fuel receipt and dashboard photo from before the return, which allowed me to get the money refunded.

I have rented cars a few times before, and Barcelona Airport in Spain is the worst. I saw many reviews online saying that they rip off Chinese customers, either by forcing you to buy extra insurance at pick-up or by charging ridiculous fees for minor damages when returning the car. At the AVIS Barcelona Airport branch, I returned the car during business hours and requested an on-the-spot inspection, but the staff kept saying they were about to leave and asked me to leave the keys in a box. The next morning, I received a text message on the flight saying that my credit card was charged 678.91 euros due to damages. I'm sure I drove carefully and there were no damages. I have photos from the time of pick-up, and now we are going back and forth. Even though I bought full insurance, which should have been handled by the insurance company, I feel it is unfair to be falsely accused like this.

We booked a BMW, but they gave us a Renault and refused to refund the difference.

We rented a car in Seville and a hotel staff member crashed into our car. The rental company immediately charged our credit card. We had purchased the super insurance from the rental company, but it's been three months, and they refuse to compensate us for various reasons. We regret not buying the rental company's full insurance. We've never had an accident before, and it feels like the rental company's insurance is a joke. I strongly recommend everyone to buy the rental company's insurance directly—do not purchase insurance from the rental company. Learn from my experience. It looks like I'll have to go through the insurance regulatory agency for this.

I always use Avis when renting a car abroad. It's pretty good, but sometimes their process is quite slow.