You can find and download all your received certificates in your ePortfolio.
In the left navigation, make sure you are in the Learner Workspace.
When in the Learner Workspace, select ePortfolio. This, depending on the Academy Settings, gives you an overview of the badges and certificates you earned, as well as your Knowledge Profile.
Select Certificates in the top navigation bar, and find the certificate you want to download. Click on View Certificate to open the certificate. In the pop-up, click Download to download your certificate.
Your certificate will be downloaded to your computer, and can now be printed.