in Italy we are not allowed to host minors under 18 unless they are accompanied, I don't know if this also applies to the USA but I would be very careful
@The-Right-Away0 If you are concerned, cancel the booking or ask the guest to provide a picture of their ID.
If you are near your rental property or have a co-host or cleaner who can be onsite, ask the guest at what time they will be arriving so that you can greet them at the door...