The purchase confirmation code is available in the licence certificate which you received once you made your purchase from Envato marketplaces.
This licence certificate can be found in two places:
- The first one is via a link in the email you received from Envato after your purchase.
- The second one is in your Envato account, in the "Downloads" tab, and beside each item you have purchased there will be a "Licence Certificate" link. Click this link and inside the plain text file you will see your code entitled "Item Purchase Code".