Does ANYONE have an answer for why some customer's credit cards don't work on self-serve printers and some do? This used to only be an issue with very odd third-party cards cashapp cards etc. but lately it seems like customers are having their cards denied by our self service machines for no reason whatsoever even though they're legitimate visa etc. cards and are accepted by our normal registers. It's getting to the point of infuriating because I'll have customers flip out about why they aren't able to pay with their card on the self-service machines and then turn around and demand I run their order because they don't want to load a cash card instead. I don't know what to tell people who are having their cards declined because it seems like the fault of our system rather than their cards otherwise their cards wouldn't work at the register either.

How long does the Pre Authorization stay on a credit card for the self service printers?

If I apply for a Staples More Account credit card do I have to use it at all or do I have to use every once or so to keep the card active? I'm only interested in applying for the card to get automatically upgraded to Premier status and don't have any interest in keeping a balance what so ever. Thanks so much in advance for any info on this subject.