There is nothing wrong with having a third party pay for the guest. Just make it clear that the third party is fully responsible for any problems. Paypal makes your payment simple. Communicate well and ask for names of all parties. If you don't get answers that satisfy you, cancel the booking. I recently had a concerned mother book our room for her highschool aged daughter and her friend traveling cross-country to see the daughter's brother. She couldn't book a hotel for them because she would have to be present with her credit card, so she experimented with Airbnb and we gave her a great customer experience. Contacted mom on girls' arrival, treated them like family that evening, fed them a breakfast of their choice, and sent a photo of the girls' departure from our driveway the next morning. Mom was overjoyed at the service she was given as a third party customer, and, in her review, she has said she plans to stop here when she makes the trip to see her son herself.