Turn on two-factor authentication

Two-factor authentication asks for a 6-digit code after your password. Any person can set it up for their own account. An Owner or Admin can turn it on for the whole workspace and make it required.

Methods

Method	How you get the code
Authenticator app	An app on your phone shows a new code every 30 seconds. The app lists the account as "Line".
Text message	Line texts a code to your mobile. Each text uses workspace credit.
Email	Line emails a code to your account email address. The code expires after 10 minutes.

Set up a method for yourself

Open Settings > Profile (/settings?tab=profile).
Go to Two-factor authentication.
On the method that you want, select Set up.
Follow the steps. For an authenticator app, scan the QR code. For text messages, enter your Mobile number.
Enter the 6-digit code and select Verify.

Then make your recovery codes:

On Recovery codes, select Set up.
Select Copy, Download or Print, and keep the codes in a safe place.
Tick I have saved these codes.
Select Done.

If you set up your first method on the sign-in screen, Line shows Save your recovery codes straight after it. Line then offers Add a backup method. Add a second method, or select Not now.

Recovery codes

You get ten recovery codes. Each code works one time. Use a code when you cannot use your other methods.

To see how many codes are left, look at Recovery codes in Settings > Profile.
To make new codes, select Regenerate. Your old codes stop working.

Turn on two-factor for the workspace

You need the Owner or Admin role.

Open Settings > Organisation Settings (/settings?tab=account).
In Two-factor authentication, select On.
For Requirement, select Required or Optional.
In Allowed methods, select one or more methods.
Optional: in Remember devices, choose how long a browser stays trusted. The choices are Off — ask at every sign-in, 1, 7, 14, 30 or 90 days.
Select Save.

Requirement	What members see
Required	Every member must pass a code to open the workspace. A member with no method sets one up first.
Optional	A member who joins by invite sees the setup screen one time, with Skip for now.

The Member two-factor table shows each member and the methods they have, or Not set up.

When the workspace remembers devices, the code screen shows a Remember this device for box. A member who ticks it does not enter a code in that browser for the period you set. To make every member enter a code at their next sign-in, select Forget all devices.

Each member can see and forget their own remembered browsers in Settings > Profile > Remembered devices > Manage.

Line emails a person when a method is added or removed, when a recovery code is used, and when their two-factor is reset.

Reset a member's two-factor

Use this when a member loses all their methods and recovery codes.

Open Settings > Team.
Select the actions menu on the member's row.
Select Reset two-factor.
Select Reset two-factor again to confirm.

The member loses all methods, recovery codes and remembered devices. Line signs them out everywhere. They set up a method at their next sign-in.

An Owner can reset any person except themselves. An Admin can reset only Members. If the person also uses another Line workspace, Line support must do the reset.

Common problems

I lost my phone. On the code screen, select Use a recovery code. If you have no codes, select Cannot verify? Get help. See Fix sign-in problems.

I cannot remove a method. While two-factor is required, you cannot remove your last allowed method. Add another method first.

Text message codes do not arrive. The workspace needs credit and a number that can send texts. Use another method, or ask an Admin to top up.

I signed in with an email code and Line does not accept email for two-factor. An email code cannot confirm an email sign-in. Use another method, a recovery code, or sign in with your password.