---
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"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/50412#article
headline: "50412: Participant proxy address is empty"
url: https://www.twilio.com/docs/api/errors/50412
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 50412: Participant proxy address is empty

Log Level: ERROR

## Description

The provided participant proxy address parameter must not be empty.

### Possible causes

* MessagingBinding.ProxyAddress parameter provided with the request contains an empty string.

### Possible solutions

* Add a non-empty MessagingBinding.ProxyAddress parameter to the API request and supply a valid participant proxy address matching your desired channel, e.g. SMS, MMS or WhatsApp.