This can happen when you start a transaction for an amount higher than the coupon amount, but end it earlier than expected. In this case, a minimum amount of 10cts is taken into account.
Why is my transaction fee €0,10 when I used a coupon?
This can happen when you start a transaction for an amount higher than the coupon amount, but end it earlier than expected. In this case, a minimum amount of 10cts is taken into account.