---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/17517#article
headline: "17517: Missing participant address"
url: https://www.twilio.com/docs/api/errors/17517
inLanguage: en
dateModified: 2026-07-31T15:59:35.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 17517: Missing participant address

Log Type: APPLICATION

Log Level: WARNING

## Description

Twilio cannot create a new transcription because each participant must include an `address` when you specify a `mediaUrl` in the Conversation configuration.

### Possible causes

The `address` field is `null` or blank.

### Possible solutions

Supply an `address` for every participant. The value must be either an E.164-formatted phone number or another valid participant identifier.

#### Additional resources

* [Specify participant information](https://www.twilio.com/docs/voice/api/batch-transcription-resource#specify-participant-information)