You cannot take a payment using the Adyen MOTO payments with an AMEX card. The error is "Sorry but your payment was declined (Payment details are not supported). Please correct your details and retry."
There is a number of possible reasons why this message is returned, in general, it means that something is wrong or missing at the setup of payment methods.
- Check if the currency that you are using in the transaction is configured for this payment method. Some payment methods such as SEPA direct debit (EUR) only support a single currency. Other payment methods can be enabled for a variety of currencies. Please visit Adyen Customer Area and go to Account > Payment Methods while on merchant level for this.
- Check the minimum amounts set for each payment method. Please visit Adyen Customer Area and go to Account > Payment Methods while on merchant level for this.
- Check that the payment method is correctly added to your account. Guidance can be found here for the MOTO payments with Adyen.
- Check if a recurring payment is attempted, while this is not configured/supported. Please refer to the Payment methods overview in Adyen to see if recurring is supported for the payment method.