---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/17502#article
headline: "17502: Invalid sourceId — not a valid Recording SID"
url: https://www.twilio.com/docs/api/errors/17502
inLanguage: en
dateModified: 2026-07-30T15:34:51.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 17502: Invalid sourceId — not a valid Recording SID

Log Type: APPLICATION

Log Level: WARNING

## Description

Twilio can't create a new transcription because the supplied `sourceId` isn't a valid Recording SID.

### Possible causes

* The value doesn't begin with the `RE` prefix.
* The value isn't 34 characters long (the prefix plus 32 hexadecimal characters).
* The value contains characters outside the hexadecimal range (`0–9`, `a–f`).

### Possible solutions

* Supply a valid Recording SID that starts with `RE` followed by 32 hexadecimal characters.
* Verify that you copied the SID correctly from the recording resource in Console or the REST API response.

#### Additional resources

* [Transcribe a Twilio Recording](https://www.twilio.com/docs/voice/api/batch-transcription-resource#transcribe-a-twilio-recording)
* [Create a transcription with a Recording SID](https://www.twilio.com/docs/voice/api/batch-transcription-resource#create-a-transcription-with-a-recording-sid)