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# FlexRequestResponse

Upon receiving and processing a FlexRequest message, the receiving implementation must reply with a FlexRequestResponse, indicating whether the flexibility request was processed successfully.

```
<FlexRequestResponse
  Metadata…
  ReferenceMessageID   = UUID
  Result               = ("Accepted" | "Rejected")
  RejectionReason      = String (Only if Result = "Rejected")
/>
```

|                     |                                                                                                                                                                                                                                                                                                                                                          |
|---------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Metadata            | The metadata for this message. For details, see [metadata attributes](metadata-attributes.md).                                                                                                                                                                                                                                                           |
| ReferenceMessageID  | MessageID of the FlexRequest that has been accepted or rejected.                                                                                                                                                                                                                                                                                         |
| Result              | Indication whether the flex request was accepted or rejected. Rejection is allowed in case the FlexRequest is not based on our latest Prognosis, a FlexRequest from the same participant for the indicated period with a higher sequence number was already accepted previously or the FlexRequest does not contain any ISPs with Disposition=Requested. |
| RejectionReason     | In case the request was rejected, this attribute must contain a human-readable description of the reason.                                                                                                                                                                                                                                                |