| Field | Type | Required | Description | Example |
|---|---|---|---|---|
reason |
JsonNullable<String> | ➖ | An optional reason to attach extra context to the refund requests. | Refund due to user request. |
externalIdentifier |
JsonNullable<String> | ➖ | An external identifier that can be used to match the refunds against your own records. | refund-12345 |