After signing in, you’ll enter a 6-digit code from an authenticator app on your phone. This helps protect your account even if someone else knows your password.
How to Enable 2FA
You can enable 2FA anytime from your account settings.
Steps
Go to Settings → Security
Click Set up two-factor authentication
Scan the QR code using an authenticator app on your phone.
Enter the 6-digit code from the app to confirm setup.
Save your backup codes in a safe place — you will need them if you lose access to your phone.
Backup codes allow you to sign in if you lose access to your phone.
Authenticator apps you can use
iPhone usersIf you scan the QR code using your iPhone camera, iOS may automatically save the code in the Passwords app instead of a separate authenticator. You can find your verification code here:
If you prefer using another authenticator app, open that app first and use its Scan QR Code / Add Account feature. |
Signing In with 2FA
If 2FA is enabled, you will see a verification step after signing in.
Steps
Sign in to Link My Books
Open your authenticator app
Enter the 6-digit code shown in the app
Click Verify
Optional: You can select Remember this device for 30 days to skip verification on that device. |
Using a Backup Code
If you don’t have access to your authenticator app, you can sign in with a backup code.
Steps
On the verification page click Use a backup code instead
Enter one of your backup codes
Important
Each code can only be used once
You receive 8 backup codes during setup
If you use your last backup code, you’ll be asked to set up 2FA again.
Disable 2FA
You can disable 2FA at any time.
Steps
Go to Settings → Security
Click Disable under Two-Factor Authentication
Enter your authenticator code to confirm
Generate New Backup Codes
If you lose your backup codes, you can generate new ones.
Steps
Go to Settings → Security
Click Regenerate backup codes
Enter your authenticator code
Save the new backup codes
Note: Generating new codes invalidates the previous ones immediately.
Troubleshooting
I lost access to my authenticator app
Try signing in with a backup code. If you don’t have backup codes, contact Link My Books Support so we can help restore access.
My code isn’t working
Common causes:
The code has expired (codes refresh every ~30 seconds)
Your phone time is out of sync
You entered the previous code
Try generating a new code in the app and entering it again.
Security Notes
After 5 failed attempts, login attempts are temporarily blocked for 5 minutes
Trusted devices can skip verification for 30 days
Backup codes are single-use