The only one I remember for sure is nice. My kid was about 8yo and decided they wanted to go shopping for our Christmas gifts by themselves. So we went to Target and my husband and I gave them some cash and instructions about not spending it all to allow for taxes. We parked ourselves at the front of the store so we saw them checking out and we could see there was some kind of issue, but it got resolved. After we got home, our kid explained that they did indeed spend every bit of the money we gave them, forgetting about taxes, but the cashier “found” a coupon so they didn’t have to put anything back.
Later that evening, I called the Target and asked to speak a manager. I explained what happened and I said I was sorry that I didn’t know the name of the cashier but I described them and their checkout lane, and wanted to send them my praise and thanks. It would’ve been so easy to just make a kid put something back or get their parents, but this lady was very kind and patient, and it really made my kid’s day. (My kid was very proud of themselves for buying their parents’ gifts all by themselves for the first time.) The manager was so relieved and said she was very grateful to get this kind of call because at that time of year they don’t always hear a lot of positive feedback.
I did think of that, so when I told the manager the story, I just said the cashier helped my kid sort everything out to make it work within their budget. I didn’t mention any discounts or coupons.