---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/60423#article
headline: "60423: Multiple contacts were found"
url: https://www.twilio.com/docs/api/errors/60423
inLanguage: en
dateModified: 2026-06-08T12:04:59.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 60423: Multiple contacts were found

Log Type: APPLICATION

Log Level: ERROR

## Description

Twilio returns this error when Verify resolves more than one contact from the lookup criteria in your request. Verify cannot continue until your request identifies a single contact record.

### Possible causes

* Your request uses lookup criteria that are too broad or ambiguous, so more than one contact matches.
* You stored duplicate or overlapping identifiers across contacts. `unique_customer_provided_id` values and channel values must be unique for each contact.
* You stored or submitted phone-based identifiers in an inconsistent format. Verify and the Contact API require phone numbers in `E.164` format.

### Possible solutions

* Send one unambiguous identifier for the contact. If you fetch a contact, use either `unique_customer_provided_id` or `channel`, not both.
* Review your contact records and merge or remove duplicates. If the contact already exists, update the existing contact instead of creating another one.
* Normalize phone numbers to `E.164` before you create contacts or start verifications, then retry the request.
* If you upsert contacts through the Contact API, use each item's `correlation_id` and response details to identify and correct problematic records before you retry.

#### Additional resources

* [Verify](/docs/verify)
* [Verifications API](/docs/verify/api/verification)
* [Contact API](/docs/messaging/features/contact-api)