Filter - URL Modification

<?php
// Allows replacing the URL in case the associated form does not exist.
add_filter('borlabsOptInWPForms_FallbackPageLink', function ($fallbackURL) {
  // Customize URL as needed
  return $fallbackURL;
}, 10, 1);

// Allows replacing the URL in case the token is invalid or the time to confirm the opt-in has expired.
add_filter('borlabsOptInWPForms_optInErrorPage', function ($errorURL) {
  // Customize URL as needed
  return $errorURL;
}, 10, 1);

// Allows replacing the URL of the confirmation page (opt-in completed).
add_filter('borlabsOptInWPForms_optInSuccessPageLink', function ($successURL, $formData) {
  // Customize URL as needed. $formData contains the object of the form used.
  return $successURL;
}, 10, 2);

?>