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Letter Sealing

What is Letter Sealing? toggle
Letter Sealing is a feature that provides End-to-end encryption (E2EE) for chat room messages. E2EE is a communication system designed so that messages saved on our servers are encrypted and cannot be read by anyone except the sender and receiver of the message.

Once the sender and receiver have both turned on Letter Sealing, they will be able to start sending messages, but with added security.

If you use the PC version of LINE after turning on Letter Sealing, you will be required to verify your identity the first time you send a message.

To verify your identity, please refer to the Help article below.


To use Letter Sealing, please update LINE to version 5.3.0 or later via the link below.

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How do I use Letter Sealing on the PC version of LINE? toggle
If you have turned on Letter Sealing and try to send a message on the PC version of LINE, you will have to verify your identity.

To verify your identity, please refer to the following steps. Please note you will need your smartphone on hand to complete the following.

1. Log in to the PC version of LINE.
2. Go to the Chats tab and open a chat window.
3. Click Verify your identity to reveal a 6 digit verification code.
4. The screen to verify your identity will appear on the smartphone version of LINE.
5. Enter the 6 digit verification code from the PC version of LINE.

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The screen to verify my identity for Letter Sealing is not appearing toggle
When verifying your identity on the PC version LINE, if the screen to enter the verification code for Letter Sealing does not appear on the smartphone version of LINE, please try the following.

1. Start the smartphone version of LINE.
2. Go to Settings > Chats & Voice Calls.
3. Turn Letter Sealing OFF, then turn it back on again.

Afterwards, please refer to the following Help article and try verifying your identity once again.

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