I have a multipage registration form working on a site, but the confirmation page is supposed to show some of the information (account name and other data) after the account has been submitted/created. I can treat this confirmation page as the last page of the multipage form, but I'm concerned that the user can then press the back button on the browser, the session data will still be there, and they can then re-submit the same data again.
Another approach would be to end the session and display the data on a redirect page, but I could not find how Drupal 7 would pass this form data to the redirect page. There would be too much data to put it in the URL.
Does anyone have a suggested Drupal 7 method to achieve a confirmation page showing session data, but not allow the user to press back on the browser and re-submit the form again?