| Name | Description | Type | Additional information | 
|---|---|---|---|
| RefundReference | Recommended to supply the original order reference to assist in retailer reconciliation | string | None. | 
| RequestedAmount | A positive, decimal number (with 2 decimal digits) representing the amount to refund. Must be lower than or equal to the original charge amount. Over-refund fails asynchronously and is not raised to the caller. | decimal number | None. | 
| SessionId | The original Cova Pay session id, captured from the payment session | string | None. |