You see them at restaurants, coffee shops, even some self-service kiosks, screens asking you to add *** tip to your purchase. It's easier than ever for companies to offer these tip prompts. The ...

American diners may be reaching a tipping point. Not long ago, a restaurant tip was a 15 percent gratuity for the server, calculated on a napkin and scrawled on a credit-card receipt at the end of a ...

Touchscreen tipping prompts are everywhere. Here's when and how much to tip in various situations. Touchscreen tipping prompts are everywhere. Here's when and how much to tip in various situations.