Our Airbnb host contacted us after we had returned from our trip claiming that one of the wooden access keys to the pool was missing and that we must pay 60 USD for it.
We are sure that all the keys were returned when cleaning the house and could not have lost them as we didn't end up needing them to use the pool. There is no real evidence that this key is actually missing or that this is a scam to get extra money from us. Furthermore, the "keys" are just pieces of wood with the unit number on them so 60USD seems like an unreasonable and arbitrary amount to pay for these.
Is our host allowed to charge us this cost and are we obligated to pay it? He was requesting the money outside of the airbnb site.