---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/60437#article
headline: "60437: Recipient type unsupported"
url: https://www.twilio.com/docs/api/errors/60437
inLanguage: en
dateModified: 2026-06-08T12:04:59.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 60437: Recipient type unsupported

Log Type: APPLICATION

Log Level: ERROR

## Description

This error indicates that the recipient you submitted is not a recipient type that Verify can use for the requested verification. Verify supports verifications to a phone number or an email address. For phone-based verifications, send the destination in `E.164` format. For email verifications, use `channel=email` and configure email for your Verify Service.

### Possible causes

* The `to` value is not a supported Verify recipient type, such as a phone number or an email address.
* You used a phone-based channel with a recipient that is not a valid phone number. Verify uses phone numbers for channels such as `sms`, `whatsapp`, `call`, and `sna`.
* You used `channel=email` with a recipient that is not an email address.
* You attempted to send an email verification before completing the required email configuration for your Verify Service.

### Possible solutions

* Send a supported recipient in `to`. Use a phone number for phone-based channels and an email address for `channel=email`.
* Format phone numbers in `E.164` before creating the verification.
* Make sure the `channel` you selected matches the recipient type you are sending. For example, use `channel=email` only with an email address.
* If you need to verify email addresses, set up email for your Verify Service first. Create the email integration, authenticate your sending domain or use single sender verification for testing, and then retry the request.

#### Additional resources

* [Verifications API](/docs/verify/api/verification)
* [Verification Channels](/docs/verify/authentication-channels)
* [Send Email Verifications with Verify and Twilio SendGrid](/docs/verify/email)