@Margaret339 Once my guest has booked, I ask them to send me their preferred email address and the number of the phone that they will be using while travelling. I explain that AirBnB does not provide me with that information and that I am unable to send PDFs to them on the platform. I tell them the address of my business email so that we are able to communicate.
It is unfortunate that AirBnB is so paranoid about business going off platform that they choose to obstruct communication between guests and owners.