A customer has been left fuming after being prompted to leave a tip of up to 20% at a self-checkout machine. The man was visiting a water park in Hungary when he stopped to pick up some refreshments from an on-site kiosk.

But he couldn’t believe his eyes when he was asked to leave either a zero, five, 10, 15 or 20 per cent tip at the machine after scanning his items.

Sharing a picture of the machine’s message on Reddit, he said: “A water park in Hungary asking for a 0-20% tip for a self-serve…