> For the complete documentation index, see [llms.txt](https://docs.goaffpro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.goaffpro.com/program-management/manage-affiliates/affiliate-profile-settings/send-s2s-callback.md).
# Send Postback/S2S Callback to the Affiliate
**GoAffPro** provides you with the option to send Postback/S2S callback to the affiliate when they get a new order.
To send Postback/S2S callback to the affiliate, go to the **All Affiliates** section in the **Affiliates** tab of the GoAffPro admin panel.
Affiliates > All Affiliates
Here, click on the **affiliate's name.**
This will open up the affiliate's profile.
Now, go to the **Settings** tab.
Settings tab
Here, go to the S2S Callback section.
Now, click on **Order created callback**.
This will open up the Setup order created callback window.
Now, select the HTTP method.
{% hint style="info" %}
You can select either GET or POST.
{% endhint %}
After this, enter the URL.
Click on **Submit**.
Finally, the newly set S2S callback will be saved.
The same process can be followed to set the Order updated callback.
Formatting the Postback URL for Affiliate Tracking
Postback URLs enable you to receive real-time notifications whenever an order is tracked. You can add dynamic variables to your URL, ensuring that each postback contains valuable order and click data. Below are the supported variables and examples on how to use them:
**Supported Variables:**
The order number: {{order.number}}
Total order amount: {{order.amount}}
Commission generated for the order: {{order.commission}}
Query parameter from the referral link (replace "param" with your chosen parameter name): {{link.query.param}}
Link hash parameter: {{link.hash}}
Link path parameter: {{link.path}}
Link sub\_id parameter: {{link.sub\_id}}
**Examples:**
1. **Basic Postback URL (Send order number & amount)**
2. **Include commission generated**
3. **Send a custom query parameter from the referral link**
If your affiliate link looks like:
You can capture it using:
4. **Using Sub ID tracking**
5. **Send all available data**
?
\
order={{order.number}}
\
\&amount={{order.amount}}
\
\&commission={{order.commission}}
\
\&subid={{link.sub\_id}}
\
\&hash={{link.hash}}
\
\&path={{link.path}}
**Notes:**
* Ensure that your URL is properly URL-encoded if you include any special characters.
* Variables are automatically replaced with actual values before the postback is fired.
{% embed url="" %}
Send S2S Callback to the Affiliate
{% endembed %}
---
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