dear security guard,
if the only thing that's wrong is that a perfectly legitimate customer that you've already checked out and let into the cage has an expired hand-scan, don't preface your phone call with "we have a situation here, and he's coming toward your office now." that, in combination with the insistent knocking on my office door that occurred when you said that, is enough to really freak me out. a "situation" would be a deranged guy with a knife who had made clear his intent to stab me. a customer with an expired hand-scan warrants prefacing your phone call with a more moderate "could you please come talk to him about what he needs." there's no need to scare me here.