John takes card payments now. At 8:00 on Saturday the payment provider slows to a crawl — some answers take half a minute. The site stops waiting and tries again, and the provider, which had in fact taken the money the first time, takes it again. Mrs Patel was charged three times for one baguette. Meanwhile everyone else's order is stuck behind hers.
JOHN’S LIST
- ○Trying again never charges anyone twice.
- ○A slow payment doesn't hold up everyone else's order.
- ○If payments are down, orders wait safely instead of hammering the provider.