Paypal Express Checkout, confirmation required?

Question

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.

Answer 1

No, it's not required.
In fact, if you want to immediately call DoExpressCheckoutPayment, I would suggest appending &useraction=commit to the URL you redirect the buyer to as well. This will change the wording on the PayPal pages from 'Continue' to 'Pay now' in order to reduce confusion for the buyer.

Simply use https://www.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-xxxxx&useraction=commit.