When performing multiple refund transactions simultaneously, at least a 5-second delay should be introduced between consecutive transactions.
The refund is performed for the highest-value transaction assigned to the given payment. This action can be performed before the payment is fully completed.
A refund is correctly performed by sending a POST request to the address:
https://api.axepta.pl/v1/merchant/{merchantId}/payment/{paymentId}/refund
where:
merchantId- client identifier,paymentId- unique identifier of the payment to which the refund applies.