---
title: Recover after a device becomes out of sync
description: A device that generates one-time passwords can get out of sync with the OATH authentication service in some cases. If you repeatedly enter valid one-time passwords that appear to be valid passwords, but AM rejects the passwords as unauthorized, your device is likely out of sync.
component: sdks
version: latest
page_id: sdks:authenticator:troubleshooting/authn-mfa-using-out-of-sync
canonical_url: https://docs.pingidentity.com/sdks/latest/authenticator/troubleshooting/authn-mfa-using-out-of-sync.html
keywords: ["Authentication", "Multi-factor Authentication (MFA)"]
---

# Recover after a device becomes out of sync

A device that generates one-time passwords can get out of sync with the OATH authentication service in some cases. If you repeatedly enter valid one-time passwords that appear to be valid passwords, but AM rejects the passwords as unauthorized, your device is likely out of sync.

To resynchronize your device, you must authenticate with a recovery code, and register the device again. Follow the steps in [Recover after replacing a lost device](authn-mfa-using-lost.html).

If you did not save the recovery codes when you registered the device, contact your administrator to remove the device from your user profile instead.