title: PayPal Django
body: <p>I am using Django-PayPal plugin (<a href="http://github.com/johnboxall/django-paypal/tree/master" rel="noreferrer">http://github.com/johnboxall/django-paypal/tree/master</a>), which works almost fine with one problem.</p>
  
  <p>I followed integration process and think that everything is the same as in the guide.
  But there is the problem, that I always get the INVALID response flag. I will not be able to determine the sucessfull IPN.</p>
  
  <p>Do you know, how to not get the INVALID response in the IPN?</p>