New Freebie! Storyline Print Certificate template
You can see a demo of the template & download the zip file here: http://goo.gl/QvIOel
The Zip file download contains the .story file, the printCertificate.html file, and the Storyline output folder.
To customize the look of the Certificate, edit the printCertificate.html file.
Remember: Be sure to insert the printCertificate.html into the Storyline output folder after you publish your Storyline module. Otherwise, the print certificate function will not work! (See the example Storyline output folder in the zip file you downloaded).