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The built-in **form submission trigger in GTM** can be hit or miss because it depends on how the form is coded (some use AJAX or don’t fire a standard submit event). A more reliable option is to track either:
* A **thank-you page load** (if the form redirects after submission), or
* An **element visibility trigger** on something unique that only appears after a successful submission (like a “Thank you for submitting” message).Both of these give you a cleaner and more consistent signal compared to the generic form submission trigger.
