I understand that you would like to generate PDF certificates that will be dynamically populated when the order is set to Completed, correct?
While this can be achieved thru the use of some third-party plugins and customization, could you please provide additional details about the PDF certificate that will be generated for us to point you in the right direction? What will the PDF certificate include, etc?
If a screenshot would be helpful, I’d recommend using https://snipboard.io or http://skitch.com/. You can share the direct link to the image as a response to this topic.
Correct, by default an Woocommerce notification is sent out once the status of the order is set to COMPLETED.
The notification email should have in the body the pdf certificate download link.
The pdf is a template dynamically populated with ORDER details of that specific ORDER. The same template is used on every ORDER, but the details of the ORDER is specific to that order.