We rented 2 scooters for a couple of days. We were able to check around the scooter. When we turned the bikes in again, they charged us 1800 baht / 50 euros for a scratch below on the bike of 1cm! The woman searched for 15 minutes, she checked every spot. And the guy is not nice at all. The rooms are seperated so other persons can't hear you arguing. Thereby they also keep your passport and don't give it back if you don't pay!