We went to Yoshinori’s place (our host) in Osaka, Japan. Yoshinori has a strange check-in, check-out system. He let us take his key out of the mailbox when we arrived, so we have to put the key back at our departure time. We definitely put the key back when we left. After we went back to our country, we received a message that Yoshinori wanted us to pay $200 because the key was lost. I asked Airbnb for assistance, mentioning that we definitely put the key back in and they should check any surveiliance cameras in the vicinity; $200 seems unreasonable to replace a single key. I received a reply from Airbnb saying that the $200 is reasonable, and I should pay. Ummm…. what about me putting the key back where it was supposed to be? What about Yoshinori’s loose security? They are just making us pay. I HATE Airbnb, and I HATE Yoshinori. What should I do now? I will not pay the money, and is it even possible to sue? I want to get some kind of legal help. How can this be possible?