Hi David,
Adding a lockbox is a practical solution for providing a backup entry method. Install a secure lockbox at your property and place a spare key inside. Share the lockbox code with your guest only if they are locked out, ensuring it remains secure.
Additionally, you can update your Airbnb listing's check-in instructions to include details about the lockbox as a secondary access method but don't include the code yet. This ensures a smooth experience for guests while maintaining security.
I hope this helps.
All the best,
Upfish Management