Ordering and paying at Smartshake is safe and easy. These are the payment methods we offer: Klarna If you don’t want to pay with your card or online bank, you can choose to receive an invoice through Klarna. Card Payment We accept the most common credit card providers: Visa, Mastercard and American Express. If you experience any issues when paying, we recommend trying a different browser or device. We don’t accept debit cards. PayPal You will be redirected to PayPal to complete your purchase, if you choose that payment method at checkout. Please contact PayPal directly, if you should experience any problems.