Careful, do this trick at the wrong place and people might think you work there. Or, just have a good "not my department" routine prepared.

Just go with the tried and true, "Let me go get the manager."

shameless plug, get a staff safety vest here: https://www.govests.com.au, we print these all the time, and unless it's an emergency services logo or Army, we would probably print it for you as well, just need the email sent from a official domain.