The staff at the rental desk engaged in fraudulent behavior. I had already purchased full insurance on Zuzuche when I booked, and during pickup, the AVIS staff explicitly mentioned that she could see I had insurance. After briefly discussing the car model, she had me sign on a palm-sized pad. While focusing on checking the car's condition, I didn't realize she secretly included additional charges for glass insurance, super collision damage waiver, etc., totaling 160.4 euros. Only upon returning the car and receiving the final invoice did I discover the extra charges. With the assistance of Zuzuche's customer service, negotiations with the AVIS airport office eventually led to a satisfactory outcome—waiving the unauthorized insurance charges.