# 13257: Invalid transcribeCallback URL

Log Type: APPLICATION

Log Level: ERROR

## Description

Twilio returns this error when the `transcribeCallback` attribute on the TwiML `<Record>` verb is not a valid URL. Twilio documents `transcribeCallback` as a relative or absolute URL that it uses to send an asynchronous `POST` request when a transcription is complete.

### Possible causes

* The `transcribeCallback` value provided on `<Record>` is not a valid relative or absolute URL.
* The `transcribeCallback` value does not conform to the URL format Twilio expects for transcription callbacks.
* A transcription callback URL was supplied for `<Record>`, but the callback destination was entered incorrectly.

### Possible solutions

* Update `transcribeCallback` to a valid relative or absolute URL.
* Verify the `transcribeCallback` value in your `<Record>` TwiML before initiating the recording.
* If you use `transcribeCallback`, also set `transcribe="true"` on `<Record>`, because Twilio requires `transcribeCallback` to be used with `transcribe`.
* If you do not need an asynchronous transcription webhook, remove `transcribeCallback` and retrieve the completed transcription later from the Transcriptions resource instead.

#### Additional resources

* [TwiML Voice: Record](/docs/voice/twiml/record)
* [Transcriptions resource](/docs/voice/api/recording-transcription)