title: Paypal: payment timeout
body: <p>We are using the "Website Payments Standard" method and now we would like to set a timeout (30 minutes) on our customer payments. In other words the customer must complete the payment registration within 30 minutes, otherwise he must do the process all over again.</p>
  
  <p>My issue is that I can´t find and variables in the API that fit my needs.</p>
  
  <p>Does anyone have a solution for this issue?</p>