> For the complete documentation index, see [llms.txt](https://docs.omnichat.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.omnichat.ai/en/features/marketing/chatbot-2.0/system-default-block.md).

# System Default Block

System Default Blocks are accessible when setting a block reply in a card for a button action.

These are preset blocks that automatically sync customer data with Omnichat system and other platforms through API.

Here's an example of setting a System Default Block in a [Text Card](https://en-docs.omnichat.ai/~/changes/332/features/marketing/bot-builder-2.0/text-card):

<figure><img src="https://2848678129-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3u2I1osIy6mEi07X1z46%2Fuploads%2Fa9jpO0heJLOaHqE9Ln0t%2FScreenshot%202025-03-22%20at%207.39.02%E2%80%AFPM.png?alt=media&amp;token=36a82518-31e0-43f7-bc0d-adbc1255a991" alt=""><figcaption><p>System Default Blocks</p></figcaption></figure>

There are 4 types of System Default Blocks:

1. **Subscribe & Unsubscribe**

* When customers click the <mark style="color:red;">**Unsubscribe button**</mark>, their subscription status changes from "Subscribed" to "Unsubscribed" in the Omnichat system.
* This stops the customers from receiving broadcasts, remarketing, and abandoned cart messages.
* Likewise, clicking the <mark style="color:red;">**Subscribe button**</mark> updates customers' subscription status to "Subscribed".
* Above subscription status applies to Facebook, Instagram, LINE, and WhatsApp.

2. **Mobile Number Binding**

* Mobile Number Binding Setup [Tutorial](https://en-docs.omnichat.ai/release-note/jun-26-2024#line-phone-numberbinding-support-for-membership-data-matching-platform-settings)

3. **Membership Card Related**

* Member Center
* My Order
* Coupon List: Setup [Tutorial](https://en-docs.omnichat.ai/release-note/aug-8-2024#sharing-the-membership-card-coupon-list-with-the-customers)

{% hint style="info" %}
If you are using SHOPLINE or CYBERBIZ, your Omnichat console will automatically sync membership data through API. Customers can check their membership status and information.

Before setting up the default blocks, follow the tutorials below to set up the membership card. Once the membership card setup is complete, you can proceed with setting up the default blocks in your chatbot.

* **Membership Card Setup Tutorials**
  * LINE Membership Card Setup [Tutorial](https://en-docs.omnichat.ai/release-note/jun-26-2024#line-membership-card-you-can-customize-the-displayed-information-on-the-membership-card)
  * WhatsApp Membership Card Setup [Tutorial](https://en-docs.omnichat.ai/release-note/may-22-2024#whatsapp-membership-card-has-been-launched)
    {% endhint %}

4. **91APP Member Related:** Setup [Tutorial](https://en-docs.omnichat.ai/~/changes/332/features/marketing/bot-builder-2.0/chatbot-module-91app-user-only)

#### Supported Cards for Each System Default Block Type

<table><thead><tr><th width="261.140625">System Default Block Types</th><th>Supported Cards</th></tr></thead><tbody><tr><td>Subscribe &#x26; Unsubscribe</td><td><ul><li>Text Card</li><li>Carousel Card</li><li>Image Carousel Message Card (LINE only)</li><li>Quick Reply Card</li><li>Option List Card (WhatsApp Only)</li></ul></td></tr><tr><td>Mobile Number Binding</td><td><ul><li>Text Card (LINE only)</li><li>Carousel Card (LINE only)</li><li>Image Carousel Message Card (LINE only)</li></ul></td></tr><tr><td>Membership Card Related</td><td><ul><li>Text Card (LINE and WhatsApp only)</li><li>Carousel Card (LINE only)</li><li>Image Carousel Message Card (LINE only)</li></ul></td></tr><tr><td>91APP Member Related</td><td><ul><li>Text Card (LINE only)</li><li>Carousel Card (LINE only)</li><li>Image Carousel Message Card (LINE only)</li><li>Quick Reply Card (LINE only)</li></ul></td></tr></tbody></table>