I went to a local bank this AM and the teller was a very nice young man WEARING A BOSTON CELTICS SWEATSHIRT.
I called their main office when I got home-——asking why not business attire. They said that they would look into it.
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Good for you! A bank is a "formal place of business" and as such, the tellers not only represent the institution, but should dress in a suitable way, which means BUSINESS ATTIRE; i.e. a suit and tie for men and something similar for women.
Cripes...I remember when bank employees, even those whom the public never saw/came in contact with, had a dress code, which most assuredly did NOT include a damned sweatshirt!