Hidden Fields and UTM Tracking
Track source attribution by passing UTM values into hidden form fields.
Quick steps
Create hidden fields for utm_source, utm_medium, and utm_campaign.
Append UTM parameters to shared links.
Map hidden values to response fields.
Test with multiple campaign URLs.
Verify values in response exports.
Best practices
Sanitize inbound query values before storage.
Set fallback values when UTMs are missing.
Do not trust client-side hidden fields for security decisions.