Payment processor could mean a number of different things. It could mean a tiny gateway operator. The sort of thing that can fail quite happily without impact t

Payment processor could mean a number of different things. It could mean a tiny gateway operator. The sort of thing that can fail quite happily without impact transaction processing (most services you use will be backed by redundant gateways). I carry some cash too. But the times I’ve needed it were for things like an outage of the internet connection at a restaurant, or an issue with a payment terminal provider (or for the very uncommon cash-only merchant).