If you lose your mobile device, or if you cannot receive an authentication code with the authentication app or by SMS, you can log into Chatwork using a backup code.

• Backup codes are provided when you set up two-factor authentication, but you can check them on the Two-Factor Authentication page any time.
• You can regenerate a set of 10 new backup codes any time.
• Once you use a backup code, it will be invalidated, so be careful.
• If you turn off two-factor authentication, the backup codes will all be invalidated as well. If you turn it on again, check for newly generated backup codes.

Checking backup codes

1. From the menu under the [Username] in the top right of the chat screen, select Account Settings.
2. Click the [Change] button for two-factor authentication.
3. Click [Confirm or regenerate] for backup codes.Then you can check the backup codes.