I'm wondering if payment "second" confirmation on my site is required by Paypal regulations or agreements.
I am talking about step/screen #4 on figure #2:
https://cms.paypal.com/cms_content/US/en_US/images/developer/ECpageflow.gif https://cms.paypal.com/us/cgi-bin/?cmd=_render-content&content_ID=developer/e_howto_api_ECGettingStarted
I want to do DoExpressCheckoutPayment just after user come back from Paypal to my site so I can print "thank you for purchase" page immediately without displaying another confirm page. I sell digital goods, without shiping and any other additional information, so this "second" confirmation is useless for me, but I can't find information if I can abandon this page.