The CancelReason request parameter is specified in the «API Integration Guide(Nov 2017)» → «API Reference» → «Request Message» documentation section:
| Parameter Name |
Type |
Mandatory |
Description |
| CancelReason |
Alpha |
|
The reason why the order was cancelled Can be one of following:
- Customer
- Fraud
- Inventor
- Other
|

gallaron
(Rónán Gallagher)
2
Yes that is a typo. It is correct in the offline API guide and must have been transposed incorrectly.
@Steve_Rivas can you correct
@dmitrii_fediuk @gallaron, this has been fixed up. thanks for highlighting