I am so glad I dont work retail anymore. You are just doing your job, and some complete idiot comes along, and you have to deal with it.
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Years ago, I had a guy (to whom we had issued a check for the product he returned) want to duke it out with me because the on the check we had inverted 2 letters of his last name.
I suggested he take it to the bank branch there in the mall and deposit/cash it, as he saw fit.
We had to call security.
I think I know the guy... Was his name is Mike Dubmass?