"Can we have the office key back before you leave."
We have a large open plan office, and a key system that uses expensive keys. It is a major drama if someone leaves without handing back their key. Building management hates getting new keys cut for new staff members.
So we had one guy leave without handing in his key. We bugged him about it, and he eventually put it in an envelope and posted it to us ... or so he says. What we actually got was an envelope which just contained a PostIt note with a cryptic message. ("It wasn't me, it was a one armed man").
Finally we figured out what must have happened. The envelope had been through the Post Office's automatic sorting machines and the key had come out. So we ring up the Post Office, faxed them a photocopy of a similar key, and got them to look through their pile of "keys that have fallen out of envelopes". (Apparently they have LOTS of keys ...) After two weeks, the answer comes back.. They cannot find it.
So now we may need to get the office lock changed ... and 15+ expensive new keys cut ... sigh.
The upside is that one of our younger staff members now understands the "one armed man" reference.