Hello @Gordon69,
On the few occasions that this has happened to me with a reservation request I've asked the person to upload a photo and I've also messaged them with some questions about arrival time, whether they'll have a car etc.
I sent a message saying something like the one below. Of course add any specific concerns or requirements you may have to the list of questions.
They always uploaded a face photo and answered the questions in a friendly communicative way that gave me the confidence to accept the request.
If they did not upload or answer the questions or I was not happy with the tone or something else about the response I would decline the request.
Example message.
It would be great if you could upload a profile photo of yourself just so as I'll know to welcome you by name and that I'm handing the key to the person who booked.
Do you know yet about what time you'll arrive?
Will you arrive by car? If so just tell me and I'll move mine so that there'll be space for you to park in front of the house.
Steve.