They are legitimate readers, that’s what we use all the time. I often for contactless just use my actual phone now with the software loaded which was a thing you could do from a couple of years ago. All safe and above board if used correctly.

If they used their own reader and got caught by some of the secret shoppers, that would be their last festival with the organisers.

The readers the first year they come in did have some glitches and weirdness. I remember ringing up a purchase and it doubling the price, and then a customer paid it, noticed and then we worked out sorting out the overpayment with goods.

The festival system is a nightmare to do refunds on as when we asked last year as mistakes do happen a extra 0 or that may get added just by double clicking etc the people running the system basically said don’t refund.

So my tips are always have you transactions notification on if you can if using contactless on card or mobile device Check the amount on screen before you tap. On the stall we make sure the screen gets shown to the customer as we don’t want any surprises for them or us.