Thank you very much for the advice.
It is the guest who booked the room already.
She insisted that she did not receive the reservation form with our address on.
So she ask for it and said it is for the family member in Tokyo.
Then I had asked her not to take any family member or friend to our place.
Yes, I can understand if they only use for the reference or for the immigration.
But it sounded like they wanted to show the family members in Tokyo, so they could come and visit her.
I was upset because she should ask for the confirmation sheet from airbnb,, or she had it, she just did not bother to check it.
If they take their family member to come to our place, I will ask them out right away.