I'm hoping to start having a stall at local vintage/craft markets.
Can someone knowledgeable explain Sum-up or similar to me? Today I paid someone by tapping their phone not the white box with my card.
I had a quick Google and I saw you can buy Sum-up machines from Argos etc. But then what?
I was looking online to find a "everything you need to know" post but couldn't find anything.
Please help 😊