↔ Request/Response parameter
| Type | Condition |
|---|---|
| installmentDetailsType | Mandatory: - PAYMENT_REQUEST with payment method INSTALLMENTN/A for: - all other cases |
| Type | Condition |
|---|---|
| installmentDetailsType | Optional |
Instalment details will most likely be chosen by the customer by using the Ratepay Instalment Calculator which has to be implemented in the shop/PSP frontend. Chapter Calculation Request explains how the installment calculation result of the CALCULATION_REQUEST maps to the installment details of the PAYMENT_REQUEST.
Instalment details transmitted by the shop during a PAYMENT_CHANGE will be ignored by the Gateway, because the new instalment plan will be calculated by the Ratepay backend system.
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