Hello Joan,
I've been hosting for five years in San Francisco and happy to share my thoughts...this has happened to me and I do the following to analyze the situation; 1) First and foremost...why is he leaving? this is the key question. If there is some type of emergency, job transfer, family issue or circumstance beyond his control, I would consider honoring a refund. What is your cancellation policy? Mine is 50% after confirming the reservation and no refund once occupying the space. I do take emergencies into consideration. If he is simply leaving for senseless reasons (and I've had this)...perhaps a) got to know the area and found a better place b) found a lower price elsewhere, I would then wish him all the best. Keep a positive relationship during the departure and tell him to process the formal cancellation on Airbnb so it will repost, and you will be happy to honor a refund provided the dates re-sell. If they don't re-sell, no refund. If people want to leave, they will pack up and leave. What you don't want is any type of friction where he may leave a bad review or express to Airbnb a non pleasant stay. Most good businesses always want the customer to be happy, like Nordstrom....they will gladly accept a return even two years later. Another important factor is to keep all forms of communication in the Airbnb thread...always. Without this, they cannot assess situations or guide you, especially if it means insurance claims, etc. Yes, I considered you invested in a door, however, that is your investment and should not be used to weigh this situation. You made the investment and will likely have many more travelers stay which will more than pay for the door. If you haven't been hosting too long and you plan to be a long term host....keep the peace. It goes a long way. christie