Series 3 — Solution · Paper 8
The Festival
The queue for wristband top-ups on Saturday morning stretched back past the second stage. Forty people, most of them carrying cash they had specifically withdrawn the day before, waiting to load credit onto a plastic band they would wear for the next twelve hours. The process took about ninety seconds per person once you reached the front. The queue took about twenty-five minutes.
Tom loaded £80. He didn’t know if that would be enough. He didn’t know what the food would cost, or whether the bar would be expensive, or how many rounds he’d end up buying. He loaded £80 because it felt like a round number that would probably cover the day, and because the alternative was coming back to the queue later.
By early evening he had spent £61. He bought a burger, two rounds of drinks for four people, a coffee in the afternoon, and a portion of chips at the end of the main act. He checked his balance on a small screen by the exit. £19 remaining.
He thought briefly about what to spend it on. He wasn’t hungry. He didn’t want another drink. He thought about buying something from the merchandise stall, decided against it, and walked to his car.
The £19 did not come back. He knew it wouldn’t. He had known it when he loaded the £80. It still felt like the wrong outcome.
The wristband system exists because festivals need a closed payment loop. Cash is slow, unhygienic, and difficult to reconcile at scale. Card terminals at every food stall require connectivity that outdoor venues often can’t guarantee. A prepaid wristband solves both problems — transactions are fast, offline-capable, and the money is already on site before anything is sold.
The cost of the solution is that unspent credit disappears. Sometimes it goes back to the organiser. Sometimes it is donated to a charity by default. Sometimes it simply evaporates. The terms are in the small print that nobody reads in the queue on Saturday morning.
The festival’s problem is not the wristband. It is that the wristband is the only tool available for what is actually a straightforward payment coordination problem: many payers, many merchants, a defined time window, fast transactions at the point of sale.
A payment arrangement on an open scheme handles the same problem differently.
Each attendee’s payment account is linked to a festival mandate before they arrive — a payment authorisation that allows any vendor on the approved list to draw against it, up to a daily limit they set themselves, using a QR code on their phone or wristband. The transactions happen the same way: scan, approve, move on. The speed is the same. The offline capability is the same — transactions queue and settle when connectivity is available.
The difference is what happens to the money that isn’t spent.
Tom’s £19 is still in his account. It was always in his account. The mandate authorised vendors to draw against it; the money only moved when a draw was made. When the festival ends and the mandate expires, the authorisation closes. Nothing is lost. Nothing needs to be returned because nothing left in the first place.
The organiser’s reconciliation is simpler, not more complicated. Every transaction is recorded against a vendor and a time. Settlement happens automatically. There is no float to manage, no unspent credit to account for, no decision to make about where the remainder goes.
Tom didn’t notice the difference. He scanned his phone at the burger stall the same way he would have tapped a wristband. He checked his balance the same way. He left when he wanted to leave.
That evening he looked at his payment history. Five transactions across the day, each with the vendor name and the amount. £61 total. His account showed no deduction for the remainder.
He mentioned it to a friend the following week. She had been to a different festival the same weekend and had lost £22 on her wristband. They had a brief conversation about why the old system existed. Neither of them could think of a reason that still made sense.
The festival is a small version of a larger problem: any environment where people move between multiple vendors over a defined period, where speed matters more than the payment method being visible, and where the payer has a reasonable expectation that money they didn’t spend should come back to them.
The conference centre where delegate credit doesn’t roll over to day two. The sports stadium where the fan who leaves at half time loses the balance on their loaded card. The theme park where a family loads credit for the children and finds £8 unaccounted for at the end of the day.
Each of these is the same situation. Each of them is solved the same way.