Why do I see charges on my account?
When you Request a listing on Overnight, an authorization is placed on that account for the full amount of the booking. Only if a host accepts your request is that authorization captured and charged.
If a request is denied or expires, your authorization should fall off in a 2-5 business days — all depending on your bank.
It's worth noting that if you're using a Debit card these authorizations may look like charges, but rest assure they are not.