Sorry to hear that Sebastian - and welcome to the community!
If it was minor damage, it might be best to fix and forget, move on. If it was bigger damage, you can go to the booking information in your Extranet and you will find a button in the right hand column for Report Guest Misconduct.
Did you take a damage deposit? If so, you could keep some or all of that. If it's really really bad damage, you should have property / business insurance to cover your losses.
If you haven't set up a damage deposit yet, set it up for future guests from Property > Policies. The problem is that Booking.com don't like you to take damage deposits - they think hosts are criminals. They might restrict you to taking it by cash on arrival. Send Booking.com a lot of messages asking that they change the settings to Bank Transfer. If a guest doesn't pay the damage deposit say 14 days before arrival, report them for non-payment and Booking.com will phone them up.
A much better way exists with AirBnb / TripAdvisor / HomeAway - when the guest pays online for their accommodation, the OTA also reserves or collects an additional amount for the damage deposit. 7 days after checkout, if the host has not claimed against the damage deposit, it is refunded to the guest. This works extremely well.
Booking.com do not want to protect hosts or future guests and do not want to do this for hosts because they don't trust hosts - Booking.com treat us like criminals.
"Guest had accident in our studio apartment causing damage. What should I do?"
Without some general details its very hard to gauge an appropriate response or next steps..
Sorry to hear that Sebastian - and welcome to the community!
If it was minor damage, it might be best to fix and forget, move on. If it was bigger damage, you can go to the booking information in your Extranet and you will find a button in the right hand column for Report Guest Misconduct.
Did you take a damage deposit? If so, you could keep some or all of that. If it's really really bad damage, you should have property / business insurance to cover your losses.
If you haven't set up a damage deposit yet, set it up for future guests from Property > Policies. The problem is that Booking.com don't like you to take damage deposits - they think hosts are criminals. They might restrict you to taking it by cash on arrival. Send Booking.com a lot of messages asking that they change the settings to Bank Transfer. If a guest doesn't pay the damage deposit say 14 days before arrival, report them for non-payment and Booking.com will phone them up.
I strongly believe there should be some form of online based escrow payment system that could easily handle this.
How I see it working....
there's possibly more steps/options/features that needs to be added, so its just an initial idea.
A much better way exists with AirBnb / TripAdvisor / HomeAway - when the guest pays online for their accommodation, the OTA also reserves or collects an additional amount for the damage deposit. 7 days after checkout, if the host has not claimed against the damage deposit, it is refunded to the guest. This works extremely well.
Booking.com do not want to protect hosts or future guests and do not want to do this for hosts because they don't trust hosts - Booking.com treat us like criminals.
"Guest had accident in our studio apartment causing damage. What should I do?" Without some general details its very hard to gauge an appropriate response or next steps..