> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognigy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# TRANSFER_REFER_ERROR

> This event triggers when a SIP REFER call transfer fails due to an unavailable or rejecting destination.

<a href="/release-notes/2026.11"><Badge className="version-badge" color="blue">Updated in 2026.11</Badge></a>

This event indicates that a call transfer attempt using the `Refer` method resulted in an error or failure.

The `Refer` method involves passing the responsibility for handling the call to another destination while maintaining the media path.

However, in this case, the transfer failed due to the destination being unavailable or rejecting the transfer request.

This event is triggered when `refer_status` is `202` and `final_referred_call_status` is any value other than `200`, including `410 Gone`. When this event fires, any configured failover or error hook runs automatically.

Payload:

```json theme={null}
{
  "payload": {
    "call_sid": "fead969f-77d0-45e2-xxxx-xxxxxxxxxxxx",
    "direction": "inbound",
    "from": "+140xxxxxxx",
    "to": "+44177xxxxxxx",
    "call_id": "fba5f700-dd3a-123c-xxxx-xxxxxxxxxxxx",
    "sip_status": 200,
    "sip_reason": "OK",
    "call_status": "in-progress",
    "account_sid": "1a3d4a19-a1e9-483f-xxxx-xxxxxxxxxxxx",
    "trace_id": "896c407644c5f22d84e5d492f503f06a",
    "application_sid": "d6a219b6-683a-4e04-xxxx-xxxxxxxxxxxx",
    "fs_sip_address": "10.1.192.202:5060",
    "originating_sip_ip": "54.171.127.194",
    "originating_sip_trunk_name": "Twilio",
    "api_base_url": "voice-gateway-app-dev-vg.cognigy.ai/v1",
    "refer_status": 500
  },
  "event": "TRANSFER_REFER_ERROR",
  "numberMetaData": {
    "number": "+140xxxxxxx",
    "country": "US",
    "countryCallingCode": "1",
    "nationalNumber": "40xxxxxxx",
    "valid": true,
    "type": "FIXED_LINE_OR_MOBILE",
    "uri": "tel:+140xxxxxxx"
  }
}
```