### Answer Yes, others have reported similar issues with call transfer extensions not working properly. [(1) ]() Known Issue: The extension appears correctly in the agent builder chat test but is missing from the transfer object during actual phone calls. In testing, the transfer includes the extension:

json
{
  "number": "+12369999999",
  "option": {
    "type": "cold_transfer",
    "showTransfereeAsCaller": true
  },
  "extension": "1234#"
}

But in real calls, the extension is omitted:

json
{
  "number": "+12369999999",
  "option": {
    "type": "cold_transfer",
    "showTransfereeAsCaller": true
  }
}

Suggested Workaround: One user reported that selecting "Keep raw input" in the transfer settings fixed it for them, though this hasn't worked for everyone. Additional Consideration: The extension format must be 0-9, '*', '#' (e.g.,

123#

) . [(2) ]() Also, some IVRs may require a pause before the digits are entered—it's unclear how Retell sends the extension digits to the IVR. [(1) ]() This appears to be a known issue that hasn't been fully resolved. I'd recommend reaching out to the Retell team directly for further assistance.

​ To learn more, see the sources I considered: [[1] Call transfer extension number not working in call transfer node](https://discord.com/channels/1186424376300679209/1425942962810130452) [[2] Call Transfer Node](https://docs.retellai.com/build/conversation-flow/call-transfer-node) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

Appreciate the feedback! Feel free to ask me again with additional guidance or context.