@Bernadette82
Third party bookings are not allowed, but, of course, they happen. You should explain this to your guest, and that as the property owner, you have the right,as per the rules of Airbnb, to see and note some form of ID of the person "booked in". As you can host up to 4 people, are you sure that the guy doing the booking isnt going to join them at some point during their stay? I always ask all my adult guests to provide a b/w copy of their ID/passport and say I have to book them in, due to fire and building regulations. I then always have an idea of who the whole group is, and not just the person doing the booking. The reviews of the person doing your booking sounds fine, but as I say, you are the property owner,so you have the right to know who your guests are..explain and ask politely.