In Norway, the card terminals usually go into an "accept with signature" mode if they are temporarily offline. So they print a receipt that the customer has to

In Norway, the card terminals usually go into an "accept with signature" mode if they are temporarily offline. So they print a receipt that the customer has to sign. (This is for BankAxept debit cards, which are standard in Norway.) In a grocery store line once, I remember a distraught customer whose card was declined due to insufficient funds. The store manager came over, yanked the ethernet cable from the payment terminal, and told the customer to try again. "Accepted with signature."