Posts about payments
System breakdown: why a refund takes days when the payment took seconds
You cancel an order and the app says the refund has started. Your bank shows nothing for days. Here is where the money is in between, and which parts of the delay a shop can and cannot change.
System breakdown: what stops a double charge when you tap Pay twice
The network drops just after you press Pay with your mobile wallet. You press again. Here is how a well-built checkout makes sure you pay once.