Actually you can. A few years ago, when paying with a German bank card, very often the transaction was turned into a direct debit transaction, because they used to be cheaper.
This used to be very common in supermarkets. Every time you had to sign the receipt this was happening. It's not as common nowadays as the fees are now more or less the same.
This used to be very common in supermarkets. Every time you had to sign the receipt this was happening. It's not as common nowadays as the fees are now more or less the same.