Record should be kept at Security manager's office, only. But even if the key is missing all kind off serial or profile information. It will still leak information to professionals. With a special tool you could measure the key and reveal its serial number. Therefore, keys going to perimeter doors or security zones should not be handed over to entrepreneurs or lent out.
Many locksmiths offer customers their own company key-profiles.
That means that standard locksmith tolls may not work. However this also means that the owner of the lost key and the complex where the key works is easily identified. Exposed to extreme heat these components will melt with obvious consequence. Why it is important to select lock and key systems from several standpoints, primarily from criminal attacks but fire safety as well. If keys should be sent they should have the same protection as secret documents.