The ING Group is one of the largest banks in the world. It offers retail and non-retail banking services throughout Europe and Asia.
To find out how to integrate with ING using our merchant API, see Integrating using the Merchant API and more specifically, the createPaymentRequest method.

ING Specific Notes

AltaPay queries the bank hourly (from 8 - 23) after the initial hour for an updated status of the transaction. If the transaction was successful, the status is changed to bank_payment_finalised and a notification is sent.