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How to | Capture Event Leads with HubSpot Forms

Automatically link form submissions to your events for real-time lead attribution.

Using a HubSpot form at a trade show booth or on a landing page is a seamless way to collect attendee information. By utilizing a hidden property, hapily automatically associates every person who submits the form with your specific event and applies the correct association label.

This approach allows you to:

  • Convert any standard HubSpot form into an event-specific lead capture tool.

  • Automatically apply the Event Lead association label to new or existing contacts.

  • Eliminate manual data entry and CSV imports after a live event.

🎥 Video Walkthrough: 

How to | Capture Event Leads with HubSpot Forms - Watch Video

Step 1: Secure Your Event Record ID

  1. Open the hapily Event Builder or navigate to your specific event record in HubSpot.

  2. Locate and copy the Record ID of the event from the About this event section or the browser URL.

Step 2: Configure the Lead Capture Trigger Property

  1. In HubSpot, navigate to Marketing > Forms and open the form you want to use.

  2. Search for the property Lead Capture Trigger in the left-hand panel.

  3. Drag and drop the Lead Capture Trigger property anywhere onto your form.

Step 3: Set the Hidden Value

  1. Click on the Lead Capture Trigger field within the form editor to open its settings.

  2. In the left-hand sidebar, check the box labeled Make this field hidden.

  3. In the Default value field, paste the Record ID you copied in Step 1.

  4. Click Update and Publish the form.

Screenshot on 2026-04-01 at 14-04-09.png

Optional Step 4: Test the Live Submission

  1. Open your published form link and submit a test entry (e.g., "Stan Lee").

  2. Upon submission, hapily detects the ID in the trigger property and instantly creates the association.

  3. Navigate to your event record in hapily and check the Lead Capture section. Your test contact will appear there with the Event Lead label automatically applied.

Summary

✅ Added the Lead Capture Trigger property to a standard HubSpot form.

✅ Configured the field as a hidden property with the Event Record ID as the default value.

✅ Verified that submissions instantly appear as Event Leads within the hapily interface.