If you are using Google Authenticator, Backup MFA codes will be provided immediately after you set up multi-factor authentication to your account.
If you lose access to your authentication device, you can use one of these backup codes to login to your account. Each code may be used only once.
To use one of the backup codes to log in, please:
- Enter your email address and your password, and then click "Log In".
- On the "Enter your authentication code" page, please click "the backup codes" link.
- Enter one of the backup codes, and then click "Log in".
If you are using Authy for Two-Factor Authentication, you can simply reset your phone at Authy as soon as you replace your smartphone.