Preventing and responding to unauthorized LINE logins (account theft)

If your device was lost or stolen, you should take the following steps to make sure that no one can use your LINE account.

• Transfer your LINE account, or create a new one.
Please do one of the following to prevent your LINE account from being used on your lost or stolen device.

Transfer your LINE account

To transfer your LINE account, refer to the following Help article based on your situation.

Transferring your LINE account with a phone number
Transferring your LINE account with a different phone number
Transferring your LINE account with your Apple ID/Google account

Create a new LINE account with the information registered to your account

Refer to Creating a new LINE account.

Be advised

If you create a new account, any paid items, chat history, friends, groups, and data for related services (including your LINE Pay balance, manga, and games) that you had will be deleted. Once this data is deleted, it cannot be restored.

If you cannot transfer your account or create a new one

If you're unable to transfer your account or create a new account with the methods above, please contact us via this Inquiry Form.

• Contact your mobile service provider.
Be sure to contact your contracted mobile service provider and let them know that your device was lost or stolen.

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You can only use this feature on your main device (typically your smartphone).

You can check what devices (PC and iPads) are logged in to your LINE account and LINE services by following the steps below.

Be advised

Any links in steps directing to LINE in-app screens can only be opened on your main device.

1. Open LINE on the main device your account is registered to.
2. Tap the Home tab >

> Account.
Note: Tap here to go to your Account settings.
3. Tap Devices.

From the Devices screen, you can see the name of the device logged into your account and how long it’s been logged in.

Tap Log out for any device you don’t want to be logged in to. If you tap Log out from all services, all devices logged into LINE services will be logged out.
Note:
- LINE IAB stands for LINE Internal App Browser (the browser in the LINE app).
- If you see names of devices you don't remember logging in to, log out from them and then change your password. See Changing your password for details.

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There has been an increase in cases of unauthorized logins that we believe are due to the use of easy-to-guess passwords.

If someone has logged in to your LINE account through a web service, it means they are able to log in to any other services linked to your LINE account (including both those offered by LINE and other companies).

Useful info

"Logging in through a web service" means using your email address and password registered to LINE to log in to another service linked to your account via a web browser (and not the LINE app).

If someone knows your information, it is also possible that they could use your email address and password to make unauthorized logins to other services that are not related or linked to LINE.

To prevent unauthorized logins, we strongly recommend changing the password you've set on LINE if it can be easily guessed or is also being used with another service.

Also, if you've registered a web-based email service like Gmail to your LINE account, changing the password registered to your email account will give you even more protection.
Note: For details about changing your password with other services, contact the relevant service provider.

If you notice a suspicious login to your account through a web service, make sure to do the following.

Topics covered

- Changing your LINE account's password

- Turning on two-factor authentication

- Blocking the official account for a suspicious website

- Deauthorizing the web service from the LINE app

- Logging out from the web service's website

Changing your LINE account's password:
You can change your LINE account's password by going to the Home tab > Settings > Account > Password.

Turning on two-factor authentication:
1. Tap the Home tab > Settings > Account.
2. Turn ON Two-factor authentication.

Blocking the official account for a suspicious website:
In some cases, when you log in to a web service with LINE it adds that service's official account as a friend. Go to the Home tab > Friends > Official accounts and block the account of the relevant service if it was added.

Deauthorizing the web service from the LINE app:
The web service the login was made from may be linked to your LINE account. Deauthorize the service by selecting the Home tab > Settings > Account > Authorized apps > the relevant service > Deauthorize > OK.

Logging out from the web service's website:
After you deauthorize a web service, you may still be logged in to it depending on how the other company designed it. Please log out from the relevant service's website.

Be advised

- Changing the password of your LINE account will not automatically log you out of the relevant web service.
- With some companies' services, you can see a list of which devices are logged in. If there are any devices that are logged in to the service, make sure to log out from those devices in addition to logging out from the service's website. For more details on how to do so, please contact the relevant service provider directly.

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When setting a password, it's important for it to be secure and difficult for other people to guess.

To set a secure password, make sure it:
• Is a complex combination of upper and lowercase letters, numbers, and symbols.

• Doesn't use personal information, such as:
- Your nickname or initials.
- The name of a child or pet.
- A birthday or anniversary of you or a loved one.
- Your address.

• Doesn't use typical strings of characters or words, such as:
- Easy to guess words or phrases (e.g. "password" or "iloveyou").
- Consecutive letters or numbers (e.g. "123456" or "abc123").
- Strings that follow the keyboard layout (e.g. "qwerty" or "1q2w3e").
Note: Your password must contain 8-20 non-repeating half-width characters, and be a combination of at least three of the following types: uppercase letters, lowercase letters, numbers, and symbols.

For the best online security, make sure to set a different passcode/password for each online service you use. Please set different passwords for each internet service to manage them more securely.

Making use of software and OS features to manage your passwords is another way to achieve secure password creation and management. You can get a complex password with ease and peace of mind by using a software feature to automatically generate a password.

If you use software to manage your passwords, you can use all different passwords for each service without the burden of remembering them.

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Account safety/security

I got a login notification from the LINE official account

My device was lost or stolen

Checking what devices are logged in to your LINE account and LINE services

Preventing and responding to unauthorized LINE logins (account theft)

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Making a secure password