Due to a previous last minute cancellation, I had to make a booking for the next day with Carmo, who uses the Automatic Approval mode. The next morning I received an email from her indicating that she was out of town on an emergency, had no one to give me the keys, and so couldn't host me. But she failed to cancel the booking on AirBnb, leaving me in the difficult position of trying to make a new booking while I had an existing one outstanding, It took two rounds of phone calls and several emails before AirBnb sorted it out for me. Hosts who use Automatic Approval MUST take responsibility for ensuring that any days they are going to be unavailable are blacked out, and AirBnb should administer stricter penalties to ensure future compliance.