Personal Shopper Names

Do you really care if a bank teller uses your name?
I recently lost my job at a bank because of a mystery shopper.
According to the shopper, I was friendly, enthusiastic, and efficient but I didn’t use their name during the transaction. The company had been harassing us about mystery shops for awhile and I got fired for this. I stand by the high level of customer service I offered to each and every client that comes through that branch. I do not believe that using the first name of a total stranger is appropriate at all. Myself, I prefer that if I am unknown to someone providing a service to me refer to me as maam, and be polite and helpful. I am uncomfortable with forced congeniality. If a personal repoir is created with the client then name usage is certainly appropriate. Am I just being weird about this? Customer service cannot be pigeon-holed, particularly in a banking situation where the needs and behaviors of the clients are so incredibly diverse. Or am I wrong?
I would rather be treated an a cordial manner without the forced use of my name by support personnel. It seems to me if personnel are unconfortable with it, then its going to come out stilted and I will pick up on that immediately. Some might even view the use of a name as a violation of HIPPA.
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