You are still allowed to ask a reasonable minimum fee, depending on the payment method. Is 10 EUR reasonable for refuel? (instead of refilling 2€ only) However

You are still allowed to ask a reasonable minimum fee, depending on the payment method. Is 10 EUR reasonable for refuel? (instead of refilling 2€ only) However price must be the same for all payment methods. If there is an administrative fee it also must be the same across payment methods, excluding business cards and Amex/Diners. https://europa.eu/youreurope/citizens/consumers/shopping/pricing-payments/index_en.htm https://europa.eu/youreurope/citizens/consumers/shopping/pri...