# FAQ entries tagged #LINE Official Account

In Chats mode, click on a rich menu from the Rich Menu pane located on the bottom right to activate it.

The company name displayed on the bottom of the profile page is your Provider name. You can change your Provider name by following these steps:

  • For Certified providers (Certified providers have a certified provider badge before their company name)

    You need to submit an application to LINE, so contact your sales representative.

  • For non-Certified providers

    From the LINE Developers Console, select provider, click Settings, and from the Provider settings, and click the Edit button under Provider name.

    Provider name edit

*It will take some time before the change of provider name is reflected on your profile page.

See The number of channels that can be created in the LINE Developers Console documentation.

You can use LINE Profile+ to get a user's phone number. For more information, see LINE Profile+ scopes in the Options for corporate customers documentation.

LINE Profile+ is only available to corporate users who have completed certain applications. If you wish you use LINE Profile+, contact your sales representative or contact our Sales partners (opens new window).

LINE uses Open Graph Protocol tags from websites to generate URL previews.

The three OGP tags used by LINE:

# Open Graph Protocol tag Example
1 og:title <meta property="og:title" content="LINE : Free Calls & Messages">
2 og:description <meta property="og:description" content="LINE is a new communication app">
3 og:image <meta property="og:image" content="http://static.naver.jp/line_lp/img/ogp.png">

Example of URL preview:

URL preview in chat

OGP configuration

Even if you don't configure OGP tags, any text or image within the URL will be automatically retrieved to generate a URL preview.

For example, for the Title, if there is no available information in og:title, the text within the title tag will be displayed. Likewise, for the Summary, if there is no available information in og:description, the text within either the description tag or the body will be displayed (If there is no retrievable information, nothing will be displayed in the preview).

LINE uses only the three OGP tags listed above. URL previews will not include information contained in any other OGP tags.

Tip

A cache-deletion tool (opens new window) for deleting the LINE server side cache of your URL preview is now available.

To delete the bot, you need to delete your LINE Official Account.

Currently, you can't get the list of group chats and multi-person chats that your LINE Official Account is participating in.

Currently, there is no function to switch the language of messages or rich menus based on the user's language.

Use the Get profile endpoint to get the user's language, and then send messages or set up a per-user rich menu based on the user's language.

If you send a message specifying a user who has blocked the LINE Official Account or a user who deleted their account, no error will occur and status code 200 will be returned as a response.

In this case, no message will be sent to the user.

When you get content, the file format of the binary data returned in the response is indicated in the Content-Type (opens new window) header of the response.

By checking the value of the Content-Type header, you can find out the file format of the content. Examples of file format indicated by the Content-Type header are as follows:

Content sent by users Content-Type header example
Image image/jpeg
Video video/mp4
Audio audio/x-m4a
File text/plain

With the Get group chat summary API, you can get the name, and URL of the icon of the group chat that the LINE Official Account is participating in.

Characters in a text are counted in UTF-16 code units (16-bit). Characters expressed in multiple code units, such as some kanji characters and Unicode emojis, are counted as multiple characters instead of one character.

However, some properties are counted in grapheme cluster (opens new window) units rather than UTF-16 code units. For more information, see Counting characters in a text in the Messaging API documentation.

Also, unlike Unicode emojis, LINE emojis provided by LINE are internally converted to the alternative text (e.g., (love)), so they're counted by the number of characters in the alternative text.

Examples of counting the number of characters in UTF-16 code units are as follows:

Character UTF-16 encoded value Number of code units Number of characters
a 0061 1 1 character
3042 1 1 character
\n 000A 1 1 character
908A 1 1 character
𠀋 D840 DC0B 2 2 characters
👋 D83D DC4B 2 2 characters
👋🏻 D83D DC4B D83C DFFB 4 4 characters

If you specify a user who doesn't actually receive the message, such as a user ID that blocked the LINE Official Account or a user ID that doesn't exist, the message won't be counted even if you call the API for sending the message.

The number of messages is counted by the number of people to whom the message was sent. In this example, if there are five people in the group chat or multi-person chat where you sent the message, the number of messages counted is five. The number of message objects specified in a single request doesn't affect the number of messages sent.

For message count when you send a message to a user who doesn't receive the message, see If I send a message to a user who doesn't receive the message, is it still counted as one message?.

For more information on pricing, see Messaging API pricing.

The order in which messages are displayed depends on how the messages are sent.

If endpoints used for sending messages are executed multiple times, the order in which the endpoints are executed and the order in which the messages will be displayed won't be necessarily the same.

If an endpoint for sending messages is executed once and multiple messages are specified in the request body, the messages will be displayed in the order specified in the request body.

Yes.

If multiple message objects are set in the request body when sending a message, the messages will be delivered in the order they are set from the top.

Message IDs are assigned a value that is unique throughout the Messaging API environment.

It doesn't mean that it's unique for each channel or message type, such as an image.

We don't disclose IP addresses.

We prevent unauthorized requests through SSL communication and Verifying signatures included in the webhook.

Your account may not have been set up to allow webhooks. To allow webhooks, enable Use webhook on the Messaging API tab of your channel settings on the LINE Developers Console.

End users can't save on Keep or forward videos sent from a LINE Official Account.

Depending response settings on the LINE Official Account Manager, the LINE Official Account will automatically send replies.

Click Edit in Auto-reply messages on the Messaging API tab of your channel settings on the LINE Developers Console to access LINE Official Account Manager and check Response setting.

LINE Official Account will automatically send replies in these cases:

  • If Greeting message is set to Enabled, it will automatically send replies when user adds your LINE Official Account as a friend.
  • If Auto-response is set to Enabled, it will automatically send replies according to the preset conditions.
  • If Chat is set to On, depending on the Chat response method setting, it may automatically send replies.

The iPad that created the LINE account or the iPad that took over the LINE account can display rich menus.

Other iPads can't display rich menus.

You can check the LINE settings screen to see if your iPad can display rich menus.

  • If Delete Account appears in Settings > Accounts, the iPad can display rich menus.

  • If Logout appears in Settings > Accounts, the iPad can't display rich menus.