If you’re not living on site or nearby, you’ll need to make arrangements for guests to pick up the vacation rental keys.
Leaving the vacation rental keys under the mat of the property or hidden in a nearby plant holder is very risky and would almost certainly invalidate your home insurance. Many property owners set up a wall-mounted, combination lockbox at their property, somewhere out of sight. Guests are provided with the location and opening combination just prior to their vacation. The combination should, of course, be regularly changed for additional security.
A good combination lockbox or small key safe can be bought from a hardware store or via a web retailer. Other property owners use property agents to provide the vacation rental keys or simply meet the guests at the property themselves. They can do a walk through the vacation rental property and provide entry instructions, keys, and other property details.
Try a digital door lock?
You could also install a keyless, digital door lock which opens with a combination of numbers chosen by you and that can be changed by you at any time. No keys are needed, just notification of the number. Which also means a bonus for you: there are no vacation rental keys for guests to lose!
For security, do not label your vacation rental keys with the property address in case they do get lost and are found by an opportunist. Paying for a new set of keys is a lot cheaper than replacing your stolen valuables! And don’t forget to include a reminder to guests in your guest contract/house rules that they are responsible for the cost of replacing lost keys.