Your help is much appreciated. Your last response raises another question though, that is order of events. I jumped on checkout completed because it seemed to be the final event after all checkout activities were completed for a sucessful transaction, including full payment on the cart amount (if that is what was sent to paypal) in fact I view the result from paypal as being either sucessful or not for the amount that was requested.

The question: does the Complete checkout event always fire after payment recieved?