[reader_mode]

How do you process cards with hand cranks ?

Also these days I think you're legally required to use some sort of government fiscalisation service where each receipt is uploaded as issued or something like that.

[ratww]

There are small handheld readers for cards with chip/RFID + PIN. I've started seeing some being used here (EU) in such emergencies.

They're pretty cheap, I even have one myself.

[yissp]

I've seen businesses in the US use these things during power outages. https://www.possupply.com/model-4850-flatbed-credit-card-imp...

[ghaff]

Most of my cards aren't embossed at this point. They'd have to write the information by hand.