title: PayPal "Thank you" page, with details
body: <p>I'm working on setting up a page that will display some information to the end-user after they make a purchase through PayPal. This page will have quite a few different tasks that it will need to execute to ensure the user receives what they had paid for, this mostly includes displaying information for the user in-case something goes seriously wrong, <strong>for example:</strong> The email containing product information is never sent.</p>
  
  <p>In this event I would like to instruct the user to fill out "X" form providing their custom transaction id, however I don't know how I'd pass that custom transaction id to the thank-you page from paypal.</p>
  
  <p>I know how to use the IPN, and I'm rather familliar with it. I've always used it to send emails, etc; However here, considering I'm selling a virtual product, I need to make sure it's delivered automatically, and providing enough information so that any problems can be dealt with accordingly. </p>