So, I got a ride to my favorite bar, and my gf was slated to pick me up on her way home. She wound up having to work late, which was fine with me.
A bunch of my friends were there, and I ended up having many beers bought for me. Eventually it was time to leave and I told the bartender I wanted to pay up. She brought me a check for $10. I knew that wasn’t correct, but she showed me a list of my transactions. Many people, including the manager, had bought me drinks.
I gave her my Visa card, she ran it, and I added a $20 tip. I usually don’t tip 200%, but she had taken great care of me and I had no idea how my friends tipped when they bought me drinks.
The next day I get an email from Visa; “Hey, did you mean to tip this much?”
(Yeah, they’re thinking the server might have altered the tip amount, but it made me laugh.)