Another thing to note about having no numbers, I sometimes volunteer to run the box office at a local theater, and we have a little Square reader that only accepts magstrips. But often it doesn’t seem to work properly, so I end up typing the numbers in manually in the Square app. I know it’s not ideal, but when you’ve got 10 people in line you just need to get it moving somehow. How would a store employee deal with a card having no numbers in this situation?
If you're using Square/Stripe they should just be using Apple Pay anyways it's more secure. If the consumer doesn't have or understand that option I'd recommend they pull up the card number in the app. I use an online-only bank and with my phone and laptop in my pockets it'd probably take me about the same amount of time to pull out a credit card as it would to open my bank app with TouchID.
I had a card that won't swipe pretty frequently, after having to have my number typed or to produce a new card for the 3rd time I finally just reported mine broken and a new one was overnighted to me.
I've always thought that its the customers burden to produce a working payment method. If I got skipped in line because my card didn't work I'd have no problems letting someone else go ahead of me while I fumbled around with my phone and wallet.
