https://www.quora.com/What-happens-if-I ... in-the-U-S
They might come after you.
Happened to me twice in one day in New York.
First in Koreatown. There was nothing wrong with the food or service. I just didn’t tip enough. They came after me on the street, and confronted me in front of lots people. They simply asked for more money. I was embarrassed, and just gave them what they wanted to get it over with. Afterwards I felt humiliated and annoyed.
Second time was somewhere close to the south side of Central Park. The food was awful. The service was terrible. I was not happy. Yet, I tipped 5%. They too came after me. I gave them 2 dollars and said the experience was bad. They looked at me in disgust. Again, I felt humiliated and angry.
I understand the tipping system in America. The minimum wages are low and waiters/waitresses survive off their tips. I’ll happily tip great food and service. But, if restaurant staff feel the need to chase people down on the street to ask for more tips, then there is something deeply flawed with the system. As a tourist, it’s very shocking and unpleasant.
I also always hear "well you have to tip because that's really the only source of income for the wait staff." But I often forget that the restaurant is required to pay the delta between the $2.13/hr or whatever and minimum wage if the tips do not cover. I mean, that's not great, but that is the contract.
Wow, I can’t believe that happened to you! I’ve worked as a waitress before multiple times @ multiple locations and would NEVER do that. Once, however, one of my tables of 2 on a busy night left without giving me a tip. My boss actually entered into the computer an $8 tip anyway. He said, “They can confront me if they have a problem with it.”
Another time I waited on a couple hand and foot - explained beers and dishes to them, gave them free samples; the whole nine yards. They tipped me five dollars. Though I felt it was unfair, I would find it extremely inappropriate to chase the customer down and demand more tip, I mean that’s just laughable.
The second part is a direct response to the pasted answer at the top. The first part is...alarming.
If you’re saying they paid with credit/debit and he added an $8 tip to their bill without their consent, he’s lucky they didn’t confront him. He could have gotten in major legal trouble for that, not to mention hurt his business.
That form of to theft happens in the UK, often it's because must tips are left on the table after the bill is paid by credit card leaving the tip box on the receipt empty. It's when they are too greedy it gets noticed. A friend had an extra £75 added to his. Not sure what happened to the restaurant when he reported it, but I think they lost their ability to use credit cards at all.
I usually tip on credit but I have left the tip field blank on two common occasions: when I do a cash tip, and when I am doing takeout (no tip). Makes me wonder. It's not like I save the receipt and compare it to the bill. I would probably notice something egregious but that's just it - if I were the restaurant I would make it something that I wouldn't notice.