During this trip, I rented from AVIS twice. The first time, I got scammed. The second time, I made sure to go through all the terms and conditions carefully to avoid being tricked. Now, AVIS requires you to sign and confirm via a tablet, which means you don't get a physical rental agreement and can't confirm specific charges. I picked up the car at Los Angeles Airport and clearly informed the staff that I had already purchased all the necessary insurance and services. However, the AVIS staff still added services like roadside assistance. When they charged my credit card on-site, it was $250, and I asked what the fee was for. The staff replied that it was just a security deposit. After returning the car, AVIS directly charged $125, which I later confirmed through the rental platform was for roadside assistance and insurance services. I feel all charges should be processed on-site during the rental process, which allows you to negotiate with the staff. Deducting the fee after returning the car feels like a hidden trap because the service is already completed and you have no way to negotiate a refund with AVIS at that point.