# Mark-as-Read API
The functions described in this document can only be used by corporate users who have submitted the required applications. To use it with your LINE Official Account, contact your sales representative or contact our Sales partners (opens new window).
By using Mark-as-Read API, "Read" can be displayed at any time in all messages sent from a specific user.
# Disabling the automatic read setting function
The LINE Official Account is set to automatically display "Read" when receiving a message from the user (the automatic read setting function). However, this setting will be disabled when using the Mark-as-Read API.
As a result, in a LINE Official Account that uses the Mark-as-Read API, "Read" will not be displayed in messages from users unless a request for the Mark-as-Read API is sent.
We recommend that you send a Mark-as-Read API request whenever a new message is sent from a user. If you send a message to the user before sending the request, the message will appear to have been sent from the official LINE account without "read" being displayed on the user's screen.
For details on the API specifications, see Mark-as-Read in the Option API reference for corporate users.