@Sherry326 What the guest doesn't understand is that while you have agreed to refund him in full, Airbnb isn't refunding the service fees they charged. I assume that is the discrepancy, and the guest should be able to see what he was charged for service fees on his booking confirmation. Just let him know that hosts have nothing to do with the service fee charged, or its refund. The guest should read the cancellation policy throughly when he books, and he'd know all this.