[hoten]

> Swiping pressure-sensitive paper over the raised numbers (the original method) is still possible

I actually had to do this in 2013! Working as a waiter at Chili's, whenever the power went out (happened once or twice the year I worked there) we'd dig out a quite heavy apparatus and make carbon copies of the credit cards. Every time I used it, my customers commented they'd never seen such a thing before (I suppose the clientele was either too young or had bad memories).

Earlier last year, I was at Shake Shack when their online payment system went down. They decided to just stop charging people (even if they had cash!) and gave out free meals. I much prefer that system.