title: How to prevent "back" button after success redirect from payment system?
body: <p>I have payment form on my site and the following question:</p>
  
  <p>When the user press "Purchase button", the payment form is opened on secure bank's page. When the user filled payment form and press "submit" hi get sms to confirm payment.</p>
  
  <p>After success confirmation it will be redirected to <strong>success_url</strong> back to out shop.</p>
  
  <p>The problem begins when user press <strong>back</strong> button in his browser because hi again receive sms confirmation.</p>
  
  <p>How to prevent to send sms again?</p>