When you have more than one copy of a key, each of the keys should be numbered consecutively. This allows you to keep track of how many keys are issued and who has
which key.
By individualizing your keys you can make sure you get the right keys back when your employees leave employment. This also helps if a key is found and has not been reported lost.
Individualizing also discourages employees from “sharing” keys.
In any case, when a key is found you know who is responsible and can take appropriate action.
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