---
title: Recover after a device becomes out of sync
description: If you repeatedly enter valid one-time passwords that appear to be valid passwords, but AM rejects the passwords as unauthorized, it is likely that your device has become out of sync with AM.
component: pingam
version: 7.2
page_id: pingam:authentication-guide:authn-mfa-using-out-of-sync
canonical_url: https://docs.pingidentity.com/pingam/8.1/am-authentication/authn-mfa-using-out-of-sync.html
llms_txt: https://docs.pingidentity.com/pingam/llms.txt
docs_for_agents: https://developer.pingidentity.com/build-with-ai/docs-for-agents.md
superseded_by: https://docs.pingidentity.com/pingam/8.1/am-authentication/authn-mfa-using-out-of-sync.html
---

# Recover after a device becomes out of sync

If you repeatedly enter valid one-time passwords that appear to be valid passwords, but AM rejects the passwords as unauthorized, it is likely that your device has become out of sync with AM.

When a registered device becomes out of sync with AM, you must authenticate to AM using a recovery code, delete your device, and then re-register your device. You can do so by performing the steps in [Recover after replacing a lost device](authn-mfa-using-lost.html).

Users who do not save recovery codes or who run out of recovery codes and cannot authenticate to AM without a verification code require administrative support to reset their device profiles. See [Reset registered devices over REST](authn-mfa-reset-devices.html) for more information.