Customers routinely tip service workers, but many shoppers are perplexed and even angry to find some self-checkout machines prompting them to leave upwards of 20%. WSJ reporter Rachel Wolfe joins ...

This is not the first time a shopper has complained about being asked to tip at self-checkout machines despite having zero interactions with an employee. Cash registers at airports, stadiums ...

How do you feel about tipping these days? According to Fox News, some 90% of Americans feel tipping has gotten out of hand.