It used to be that many companies that accepted credit cards would have a backup carbon copy imprint machine to capture a rubbing of your card alongside your si

It used to be that many companies that accepted credit cards would have a backup carbon copy imprint machine to capture a rubbing of your card alongside your signature as an offline credit card capture mechanism that was reconciled later. They made a satisfying KA-THUNK sound. Now that many cards no longer use raised numbers I expect such mechanisms wouldn’t work as well.