---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/19041#article
headline: "19041: Invalid or missing Custom Field input"
url: https://www.twilio.com/docs/api/errors/19041
inLanguage: en
dateModified: 2026-06-09T11:00:42.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 19041: Invalid or missing Custom Field input

Log Type: APPLICATION

Log Level: ERROR

## Description

The request body contains invalid custom field data. This error occurs when a required custom field value is missing, when a custom field value does not match the expected format, or when the same custom field is provided more than once in the request.

### Possible causes

* A required custom field value was omitted from the request body.
* A custom field value was included in an invalid format or with an unsupported value.
* The same custom field was submitted multiple times in a single request.
* The request body structure does not match the expected schema for the resource you are creating or updating.

### Possible solutions

* Review the request body and confirm that each required custom field is included.
* Validate each custom field value before sending the request.
* Remove duplicate custom fields from the request body.
* Check the expected request parameters for the endpoint you are calling and make sure the payload matches the documented schema.
* Retry the request only after correcting the invalid custom field input.

#### Additional resources

* [Twilio Proxy documentation](/docs/proxy)