Capture Lead Source on Sparkforge Forms and Surveys

By Sparkforge Support Team ·Last reviewed May 3, 2026

Add a hidden Source field to any Sparkforge form or survey to tag submissions with a fixed lead source, or override it on the fly with a ?source= URL parameter to track campaigns.

The Source field tells you where a lead actually came from. Drop it on every form, set a default value, and override it per campaign with a URL parameter. The result: every contact in your CRM has a Contact Source attached the moment they submit.

Add the Source field

Open the form or survey in the builder.
Find Source under Quick Add.
Drag and drop it into the form.
Click the field, then enter a default value in the Source setting (for example, website-contact-page).

The field is hidden — submitters never see it. The value rides along with the submission.

How submissions look

After a form submission, the captured source value appears in the submission record and on the contact record as Contact Source. Filter contacts by source to see exactly which channels are producing leads.

Override with a URL parameter

Add ?source=value to the form's link to override whatever default you set in the builder. Useful for paid campaigns, partner referrals, and email pushes.

https://link.sparkforge.com/widget/form/WKEnUOXEz9J3cpcQyc1M?source=facebook-ad-spring-promo

That submission will be tagged as facebook-ad-spring-promo instead of the form's default. Use a unique source string per campaign so reporting is unambiguous.

Practical patterns

Per-channel landing pages — Same form, different URL with ?source= baked in.
Email link tracking — Append ?source=newsletter-2026-04 to know exactly which send drove the lead.
Partner attribution — Hand each partner their own link with their slug as the source.

Frequently Asked Questions

Will the Source field be visible to people filling out my form?

No. The Source field is hidden by design. It captures a value behind the scenes and never renders in the form UI.

What happens if I set a default source and also pass a URL parameter?

The URL parameter wins. The form's default source value is replaced by whatever you pass in ?source= for that submission.

Where does the source value end up after submission?

It's stored on the submission record and surfaces on the contact as Contact Source. You can filter or segment your CRM by it.

Can I use the source field to track paid ads?

Yes. Append a unique ?source=campaign-name to the link in each ad. Each submission gets that tag, which lets you measure paid-channel performance against organic.