Key found. What should I do?

Please send any keys or badges you have found to:
dormakaba Schweiz AG
Found Keys
P.O. Box
8620 Wetzikon, Switzerland
or hand them in to a lost property office or police station. Please state where you found the item. dormakaba Schweiz AG will inform the owner about the key. Please be aware that we are unable to provide any details about the owner for security reasons.
Note: we are unable to return lost and found Kaba 8 keys to their owners because these locking systems are not registered.
Many thanks for your efforts.