True 'phone call I made a few years ago.... It was the made to an admin office after I'd fixed their print queue problem...
Me: Good morning, I'm from the support office, I'd just like to confirm that your printer is working this morning?
Admin girl: No, it's still broken.
Me: That's strange, I printed a test and it reported as OK!
Admin girl: Well, nobody's printed anything this morning.
Me: Do you think you could check the waste basket and see if there's any print jobs in it?
Admin girl: There won't be any 'cos the printer's broken!
Me: OK, but could you confirm that?
Admin girl: Oh I suppose so..... Ah yes there's one sheet of paper in the bin.
Me: Has it got anything printed on it?
Admin girl: It says - this is a test print - do not throw this away - please call Richard on x4949
Me: Thanks, have a great day!