---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/52145#article
headline: "52145: Failed to authenticate with APNs"
url: https://www.twilio.com/docs/api/errors/52145
inLanguage: en
dateModified: 2026-03-11T20:43:38.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 52145: Failed to authenticate with APNs

Log Level: ERROR

## Description

### Possible causes

* Unable to complete the TLS handshake with APNs.

### Possible solutions

* Verify that your certificate and private key are correct and can be used together.
* Verify that your certificate has not been revoked.
* If the problem persists, please contact [customer support](https://www.twilio.com/help/contact).