---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/13311#article
headline: "13311: Gather: Invalid finishOnKey value"
url: https://www.twilio.com/docs/api/errors/13311
inLanguage: en
dateModified: 2025-12-18T21:40:49.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 13311: Gather: Invalid finishOnKey value

Log Level: WARNING

## Description

The value of the finishOnKey attribute must be one of the following characters "0123456789#\*". See the [Gather Verb](/docs/voice/twiml/gather#finishOnKey) API Reference for more information.