Message types

Zalo Notification Service

Message templates

Zalo Notification Service (ZNS) messages must always use pre-approved templates registered with Zalo. Templates can include text, placeholders, accented characters; and rich formatting such as tables, images, and call-to-action (CTA) buttons.

ZNS templates support a maximum of 400 characters.

For more information, refer to the ZNS compliance and guidelines section. For assistance with registering a Zalo ZNS template, contact our Support.

URL shortening and tracking

Infobip enables URL shortening and tracking for ZNS messages, allowing businesses to monitor link clicks only for CTA (call-to-action) buttons. Customers can use URL shortening in two ways:

1. Shortening URLs inside placeholders

You can register a template placeholder (param1) for URLs. Infobip will automatically shorten them when sending messages if shortening is enabled. However, these shortened links will not be clickable in the Zalo app on mobile devices, meaning engagement (click tracking) is not possible. However, these shortened links will not be clickable in the Zalo app on mobile devices, meaning engagement (click tracking) is not possible.

2. Tracking clicks on URLs in CTA buttons

For click tracking, the template must include a CTA button with a custom domain at the time of creation. The button's URL must be in the following format: https://<custom_domain>/<param1>.

The param1 parameter is a registered placeholder that will be replaced with the full URL when sending the message. The custom domain must be verified for the customer's account and cannot be changed later.

Click tracking is only available for URLs inside CTA button. URLs in CTA buttons cannot be shortened if the template was not initially created for tracking.

Important considerations

All placeholders in a template will be shortened. You cannot selectively exclude certain parameters.
Only CTA button templates allow click tracking. Shortened URLs in template placeholders are not clickable.
Always provide the full original URL as the parameter value for CTA button templates. Infobip will automatically shorten it.
Do not manually insert a pre-shortened URL as the parameter value.
Once registered, a CTA button's domain cannot be modified, and tracking cannot be enabled for templates not originally created for this purpose.

Tracking and shortening is available over:

Zalo over Broadcast

Use Broadcast to send a one-time Zalo campaign using a preapproved message template. You can populate template parameters with dynamic values, add SMS as a fallback option, and configure delivery settings such as scheduling and validity.

Set up your message
- Log in to the Infobip web interface (opens in a new tab).
- Go to Broadcast (opens in a new tab) and select Create broadcast.
- Select Zalo as the preferred channel.
Fill in the message details
- Recipient: Add user(s) by uploading from a file, using an existing file, or adding them from People.
- Sender: Select your Zalo sender.
- Template ID: Enter the ID of the approved Zalo template you want to send.
- (Optional) Add parameters: Insert custom parameters to personalize your message content.
- Failover to SMS: Toggle on to ensure the message is sent as an SMS if the user cannot receive Zalo.
Adjust delivery options
- Adjust additional broadcast options.
NOTE
To track clicks on Zalo CTA buttons, make sure the button URL is registered in the correct format (for example, https://mybrand.com/<param1>).
Preview and confirm
- Select Continue to preview.
- Review the broadcast summary. Zalo preview is not available, only SMS failover content will be visible.
- If needed, select Back to settings to edit.
Send the broadcast
- Select Launch to send your Zalo broadcast with SMS failover.
- Optionally, select Send test to send a test message before launching the full campaign.

Compliance and guidelines Zalo over API