How to Detect Broken Website Forms

A broken contact or lead form is one of the quietest failures on the web: the visitor sees a normal page, while their enquiry is lost. Here is how to catch it early.

Forms are where most lead-generation businesses make their money, and they are notoriously quiet when they break. The page returns 200, the layout is intact, and submissions simply stop arriving.

Why forms fail silently

• The form's backend endpoint starts rejecting requests (CORS, auth, rate limits).
• An anti-spam service begins blocking legitimate submissions.
• A dependency (email/SMTP, CRM, webhook) goes down while the page itself is fine.
• Front-end JavaScript errors prevent the submit handler from running.

How to detect it early

1. Watch the form page so you know if it stops loading.
2. Watch the submission endpoint for healthy responses — read-only checks that do not create real enquiries.
3. Watch the delivery path (the email or CRM the form feeds).
4. Set an alert threshold for "expected submissions but none received" over a window.

What ForgeGuard does

ForgeGuard treats forms as a first-class revenue-path component and monitors the form page and delivery path with read-only checks, so a silent failure becomes a visible incident.

Limitations

Detection depends on the checks you configure and the endpoints you can safely test. It shortens outages but does not guarantee zero lost submissions.