Limitations and Regulations


If one developer already manages 100 Messaging API channels, you cannot add the developer to another Messaging API channel created by another developer.


  • The provider name is displayed on the user consent screen. The user identifies the service provider based on the provider name. Therefore, provider names should not be temporary names (e.g. brand names used only in your organization, project names, etc.).
  • When you are providing service as a company or organization, create a provider using the name of the company or organization.
  • A channel used by the service provider must be created within the same provider.
  • Each developer can create up to 10 providers. The 11th provider can't be created.

Certified Provider

Once you become a certified provider, you can display your certified provider badge on the consent screen that users review. You can also configure and publish a Provider page. A certified provider badge signifies that LINE has confirmed the authenticity of the service provider that created the provider.
LINE checks the following:

  • Whether the organization is a real entity
  • Whether the application was submitted by someone who belongs to the organization (or a representative)
  • Whether the organization has an established privacy policy that has been disclosed

The certified provider badge can only be displayed by corporate users who have submitted a specified application. If you wish to display a certified provider badge, contact your sales representative, or submit your inquiry to Sales Partners.


The certified provider badge does not indicate LINE's support or warranty for the service provided by the service provider.


  • When using the LINE platform for multiple services, don't link the LINE user information obtained from each individual service.
  • "LINE" or a similar string can't be included in the channel name.
  • Developers can own a maximum of 100 channels with an Admin role under one provider, regardless of the channel type.
  • Developers can own a maximum of 100 LINE Official Accounts for each account logged in to the LINE Official Account Manager.
  • If a developer creates a Messaging API channel in the LINE Developers Console, the corresponding LINE Official Account will be automatically created and displayed in the LINE Official Account Manager. If the developer is added as an Admin to a Messaging API channel created by another developer, the corresponding LINE Official Account will be displayed in the LINE Official Account Manager.

Precautions for using a LINE Login channel:

  • Immediately after you create a LINE Login channel, the channel is set to Developing mode.
  • When the channel is set to Developing, only the developers who are registered as the channel Admin or Tester can use LINE Login.
  • To let the end users use LINE Login, set the LINE Login channel to Published.

Precautions for developing services that link multiple channels:

  • When developing a service that links a Messaging API channel with a LINE Login channel, create both channels within the same provider.
  • A-LINE user who uses services provided by developers is given a different user ID for each provider. User IDs can't be used to identify the same user across channels under different providers.
  • You can't switch to another provider after creating a channel.