duplicate email

Hi @wpdebuglog,

Thank you for replying.

Is this the hook?

`/* cfdb7 before save data. */
$form_data = apply_filters(‘cfdb7_before_save_data’, $form_data);

do_action( ‘cfdb7_before_save_data’, $form_data );

I’m just wondering how can i use it in functions.php. my function should return invalid to wpcf7 but i can’t seem to understand on how will i use this hook.