Tipping in restaurants and hotels is normal in many countries. People put tips in a jar near a cash register. There is now a new way to tip – self checkout machines. People are not happy about them because they are asking for a tip. They are in bookstores and clothes shops in the USA. There is no face-to-face contact between people, so customers in stores are unhappy about tipping a machine.

A newspaper said people in the USA are becoming tired of tipping self-checkout machines. They are experiencing "tipping fatigue". Nearly 20 per cent of people now leave tips for things like bottles of water. A customer at one store said self-checkout machines asking for tips was like "emotional blackmail". A digital payments company said the machines have increased the number of tips by 15 per cent.