extra guest ...

[Marco89]

Hi my name is Marco and rented my flat in London to one guy for 11 nights, am at the moment abroad and I receive a txt message from another person telling me that is sharing my flat asking for a
a second set of keys... now at my flat I have a supplement of gbp 10 per day for a second guest and the booking supposed to be for one guest only.... the stay is 11 nights and I feel a bit annoyed about this guy not telling me the true ...what shall i do ???

[Donna15]

@Marco89, you should inform the guest that you require payment for the second person whom you have learned is staying at your place. 

You can fill out a request to change the booking, and the guest will either accept or decline. 

https://community.airbnb.com/t5/General-Hosting/Change-Price-Number-of-Guests-Check-in-or-Check-out-...

If the guest declines, I suggest you alert AirBnB to the fact that he is breaking one of your ground conditions (as the contract concerns you and one guest, not two guests). 

https://community.airbnb.com/t5/Tips-Tricks/Contact-Airbnb-A-Community-Help-Guide/m-p/16165#M728